diff --git a/Navmesher/Navmesher.vcxproj b/Navmesher/Navmesher.vcxproj
index 3f97a8e..1cc51af 100644
--- a/Navmesher/Navmesher.vcxproj
+++ b/Navmesher/Navmesher.vcxproj
@@ -104,7 +104,7 @@
       <SDLCheck>true</SDLCheck>
       <PreprocessorDefinitions>_DEBUG;_WINDOWS;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <ConformanceMode>true</ConformanceMode>
-      <AdditionalIncludeDirectories>..\imgui\backends;..\glfw\include;..\imgui;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
+      <AdditionalIncludeDirectories>..\SizedBuffer;..\ESPReader;..\imgui\backends;..\glfw\include;..\imgui;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
     </ClCompile>
     <Link>
       <SubSystem>Console</SubSystem>
@@ -159,6 +159,14 @@
   <ItemGroup>
     <None Include="..\imgui\misc\debuggers\imgui.natvis" />
   </ItemGroup>
+  <ItemGroup>
+    <ProjectReference Include="..\espReader\espReader.vcxproj">
+      <Project>{c403cba2-86ae-4442-87cf-26b283a549c2}</Project>
+    </ProjectReference>
+    <ProjectReference Include="..\SizedBuffer\SizedBuffer.vcxproj">
+      <Project>{cb1c8f66-5b90-4de7-890b-f6430daaf25f}</Project>
+    </ProjectReference>
+  </ItemGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
   <ImportGroup Label="ExtensionTargets">
   </ImportGroup>
diff --git a/Navmesher/main.cpp b/Navmesher/main.cpp
index c1d7834..5fc73a0 100644
--- a/Navmesher/main.cpp
+++ b/Navmesher/main.cpp
@@ -1,42 +1,152 @@
-// Dear ImGui: standalone example application for GLFW + OpenGL 3, using programmable pipeline
-// (GLFW is a cross-platform general purpose library for handling windows, inputs, OpenGL/Vulkan/Metal graphics context creation, etc.)
-// If you are new to Dear ImGui, read documentation from the docs/ folder + read the top of imgui.cpp.
-// Read online: https://github.com/ocornut/imgui/tree/master/docs
+// Based on Dear ImGui GLFW + OpenGL 3 standalone example
 
+#include "ESPReader.h"
 #include "imgui.h"
 #include "imgui_impl_glfw.h"
 #include "imgui_impl_opengl3.h"
 #include <stdio.h>
+#include <cstdlib>
+#undef NDEBUG
+#include <assert.h>
+#define NDEBUG
 #include <GLFW/glfw3.h> // Will drag system OpenGL headers
 
 const float BASE_FONT_SIZE = 13;
+const ImGuiWindowFlags window_flags = ImGuiWindowFlags_NoDecoration | ImGuiWindowFlags_NoMove | ImGuiWindowFlags_NoSavedSettings;
+
+MetaTree ReadESP(const char *filename);
+
+GLFWwindow *Setup(void);
+void NewFrame(void);
+void Fullscreen(void);
+void Render(GLFWwindow *window, const ImVec4 clear_color);
+void Cleanup(GLFWwindow *window);
+void ChangeScale(bool *scale_update, const float scale);
+
+void ScalingWidget(bool *scale_update, float *scale);
+void ESPTreeWalk(MetaNode *m);
 
 static void glfw_error_callback(int error, const char *description)
 {
         fprintf(stderr, "Glfw Error %d: %s\n", error, description);
 }
 
-void ChangeScale(bool *scale_update, const float scale);
-void ScalingWidget(bool *scale_update, float *scale);
-
 int main(int, char **)
 {
-    // Setup window
-        glfwSetErrorCallback(glfw_error_callback);
-        if (!glfwInit())
+        GLFWwindow *window = Setup();
+        if (!window)
                 return 1;
 
-    // GL 3.0 + GLSL 130
+        MetaTree m = ReadESP("Skyrim.esm");
+        m.root->user = (void *)true;
+
+        // Our state
+        ImVec4 clear_color = ImVec4(0.45f, 0.55f, 0.60f, 1.00f);
+        bool scale_update = false;
+        float scale = 1.0f;
+
+        // Main loop
+        while (!glfwWindowShouldClose(window))
+        {
+        // Poll and handle events (inputs, window resize, etc.)
+        // You can read the io.WantCaptureMouse, io.WantCaptureKeyboard flags to tell if dear imgui wants to use your inputs.
+        // - When io.WantCaptureMouse is true, do not dispatch mouse input data to your main application, or clear/overwrite your copy of the mouse data.
+        // - When io.WantCaptureKeyboard is true, do not dispatch keyboard input data to your main application, or clear/overwrite your copy of the keyboard data.
+        // Generally you may always pass all inputs to dear imgui, and hide them from your application based on those two flags.
+                glfwPollEvents();
+
+                // Interface scaling
+                ChangeScale(&scale_update, scale);
+
+                // Start the Dear ImGui frame
+                NewFrame();
+
+                // Setup for fullscreen
+                Fullscreen();
+
+                // Begin window
+                ImGui::Begin("ESP Browser", NULL, window_flags);
+
+                ScalingWidget(&scale_update, &scale);
+
+                ESPTreeWalk(m.root);
+
+                // End window
+                ImGui::End();
+
+                Render(window, clear_color);
+        }
+
+        free(m.esp.data);
+        free(m.tree.data);
+
+        Cleanup(window);
+
+        return 0;
+}
+
+MetaTree ReadESP(const char *filename)
+{
+        errno_t ret = 0;
+
+        SizedBuf esp_buf        = { 0 };
+        ESPStats stats          = { 0 };
+        SizedBuf tree_buf       = { 0 };
+        MetaTree tree           = { 0 };
+
+        // Read in the esp file
+        {
+                FILE *fp;
+                ret = fopen_s(&fp, "Skyrim.esm", "rb");
+                assert(fp && !ret);
+
+                fseek(fp, 0L, SEEK_END);
+                esp_buf.size = ftell(fp);
+                rewind(fp);
+
+                esp_buf.data = (char *)malloc(esp_buf.size);
+                assert(esp_buf.data);
+
+                size_t read = fread(esp_buf.data, sizeof(char), esp_buf.size, fp);
+                fclose(fp);
+                assert(read == esp_buf.size);
+        }
+
+        // Calculate esp stats
+        stats = espr_stats(esp_buf);
+
+        // Construct the meta tree
+        {
+                tree_buf.size = espr_tree_size(stats);
+                tree_buf.data = (char *)malloc(tree_buf.size);
+                assert(tree_buf.data);
+                tree = espr_create_tree(esp_buf, tree_buf);
+        }
+
+        // lazy file pointer cleanup
+        _fcloseall();
+
+        return tree;
+}
+
+GLFWwindow *Setup(void) 
+{
+        // Setup window
+        glfwSetErrorCallback(glfw_error_callback);
+        if (!glfwInit())
+                return NULL;
+
+        // GL 3.0 + GLSL 130
         const char *glsl_version = "#version 130";
         glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
         glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 2);
         glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
         glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE);
 
-    // Create window with graphics context
+        // Create window with graphics context
         GLFWwindow *window = glfwCreateWindow(1920, 1080, "Dear ImGui GLFW+OpenGL3 example", NULL, NULL);
         if (window == NULL)
-                return 1;
+                return NULL;
         glfwMakeContextCurrent(window);
         glfwSwapInterval(1); // Enable vsync
 
@@ -67,80 +177,60 @@ int main(int, char **)
         ImGui_ImplGlfw_InitForOpenGL(window, true);
         ImGui_ImplOpenGL3_Init(glsl_version);
 
-        // Our state
-        ImVec4 clear_color = ImVec4(0.45f, 0.55f, 0.60f, 1.00f);
-        bool scale_update = false;
-        float scale = 1.0f;
+        return window;
+}
 
-        // Main loop
-        while (!glfwWindowShouldClose(window))
+void NewFrame(void) 
+{
+        ImGui_ImplOpenGL3_NewFrame();
+        ImGui_ImplGlfw_NewFrame();
+        ImGui::NewFrame();
+
+}
+
+void Fullscreen(void) 
+{
+        const ImGuiViewport *viewport = ImGui::GetMainViewport();
+        ImGui::SetNextWindowPos(viewport->WorkPos);
+        ImGui::SetNextWindowSize(viewport->WorkSize);
+}
+
+
+void Render(GLFWwindow * window, const ImVec4 clear_color) 
+{
+        ImGuiIO &io = ImGui::GetIO();
+
+        ImGui::Render();
+
+        int display_w, display_h;
+        glfwGetFramebufferSize(window, &display_w, &display_h);
+        glViewport(0, 0, display_w, display_h);
+        glClearColor(clear_color.x * clear_color.w, clear_color.y * clear_color.w, clear_color.z * clear_color.w, clear_color.w);
+        glClear(GL_COLOR_BUFFER_BIT);
+        ImGui_ImplOpenGL3_RenderDrawData(ImGui::GetDrawData());
+
+        // Update and Render additional Platform Windows
+        // (Platform functions may change the current OpenGL context, so we save/restore it to make it easier to paste this code elsewhere.
+        //  For this specific demo app we could also call glfwMakeContextCurrent(window) directly)
+        if (io.ConfigFlags & ImGuiConfigFlags_ViewportsEnable)
         {
-            // Poll and handle events (inputs, window resize, etc.)
-            // You can read the io.WantCaptureMouse, io.WantCaptureKeyboard flags to tell if dear imgui wants to use your inputs.
-            // - When io.WantCaptureMouse is true, do not dispatch mouse input data to your main application, or clear/overwrite your copy of the mouse data.
-            // - When io.WantCaptureKeyboard is true, do not dispatch keyboard input data to your main application, or clear/overwrite your copy of the keyboard data.
-            // Generally you may always pass all inputs to dear imgui, and hide them from your application based on those two flags.
-                glfwPollEvents();
-
-                static ImGuiWindowFlags flags = ImGuiWindowFlags_NoDecoration | ImGuiWindowFlags_NoMove | ImGuiWindowFlags_NoSavedSettings;
-
-                // Interface scaling
-                ChangeScale(&scale_update, scale);
-
-                // Start the Dear ImGui frame
-                ImGui_ImplOpenGL3_NewFrame();
-                ImGui_ImplGlfw_NewFrame();
-                ImGui::NewFrame();
-
-                // setup for fullscreen
-                const ImGuiViewport *viewport = ImGui::GetMainViewport();
-                ImGui::SetNextWindowPos(viewport->WorkPos);
-                ImGui::SetNextWindowSize(viewport->WorkSize);
-
-                ImGui::Begin("ESP Browser", NULL, flags);
-
-                ScalingWidget(&scale_update, &scale);
-
-                if (ImGui::TreeNode("Test")) 
-                {
-                        ImGui::Text("Text");
-                        ImGui::TreePop();
-                }
-
-                ImGui::End();
-
-                // Rendering
-                ImGui::Render();
-                int display_w, display_h;
-                glfwGetFramebufferSize(window, &display_w, &display_h);
-                glViewport(0, 0, display_w, display_h);
-                glClearColor(clear_color.x * clear_color.w, clear_color.y * clear_color.w, clear_color.z * clear_color.w, clear_color.w);
-                glClear(GL_COLOR_BUFFER_BIT);
-                ImGui_ImplOpenGL3_RenderDrawData(ImGui::GetDrawData());
-
-                // Update and Render additional Platform Windows
-                // (Platform functions may change the current OpenGL context, so we save/restore it to make it easier to paste this code elsewhere.
-                //  For this specific demo app we could also call glfwMakeContextCurrent(window) directly)
-                if (io.ConfigFlags & ImGuiConfigFlags_ViewportsEnable)
-                {
-                        GLFWwindow *backup_current_context = glfwGetCurrentContext();
-                        ImGui::UpdatePlatformWindows();
-                        ImGui::RenderPlatformWindowsDefault();
-                        glfwMakeContextCurrent(backup_current_context);
-                }
-
-                glfwSwapBuffers(window);
+                GLFWwindow *backup_current_context = glfwGetCurrentContext();
+                ImGui::UpdatePlatformWindows();
+                ImGui::RenderPlatformWindowsDefault();
+                glfwMakeContextCurrent(backup_current_context);
         }
 
-        // Cleanup
+        glfwSwapBuffers(window);
+}
+
+void Cleanup(GLFWwindow *window)
+{
         ImGui_ImplOpenGL3_Shutdown();
         ImGui_ImplGlfw_Shutdown();
         ImGui::DestroyContext();
 
         glfwDestroyWindow(window);
         glfwTerminate();
-
-        return 0;
 }
 
 void ChangeScale(bool *scale_update, const float scale) 
@@ -152,7 +242,8 @@ void ChangeScale(bool *scale_update, const float scale)
 
         if (*scale_update) {
                 ImFontConfig font_config;
-                font_config.SizePixels = (BASE_FONT_SIZE * scale);
+                // Truncate to 2 decimal places
+                font_config.SizePixels = ((float)(int)(BASE_FONT_SIZE * scale * 100)) / 100;
                 io.Fonts->Clear();
                 io.Fonts->AddFontDefault(&font_config);
                 ImGui_ImplOpenGL3_UpdateFontsTexture();
@@ -179,3 +270,22 @@ void ScalingWidget(bool *scale_update, float *scale)
         ImGui::PopItemWidth();
 }
 
+void ESPTreeWalk(MetaNode *m)
+{
+        char buf[1024] = { 0 };
+        SizedBuf sb = { buf, 1024 };
+        espr_meta_string(m, sb);
+        if (m->n.type == NT_RECORD) {
+                ImGui::BulletText(buf);
+        } else {
+                if (ImGui::TreeNode(buf)) {
+                        MetaNode *c = m->first_child;
+                        while (c) {
+                                ESPTreeWalk(c);
+                                c = c->next;
+                        }
+                        ImGui::TreePop();
+                }
+        }
+}
+
diff --git a/espReader/ESPReader.h b/espReader/ESPReader.h
index a6d166a..1880e9b 100644
--- a/espReader/ESPReader.h
+++ b/espReader/ESPReader.h
@@ -247,7 +247,7 @@ extern "C" {
          */
         struct meta_node {
                 Node n;
-                MetaNode *parent;
+                void *user;
                 MetaNode *first_child;
                 MetaNode *last_child;
                 MetaNode *prev;
@@ -255,6 +255,9 @@ extern "C" {
         };
 
         struct meta_tree {
+                // hack, not usable when modifying tree
+                SizedBuf tree;
+                SizedBuf esp;
                 MetaNode *root;
                 size_t size;
         };
@@ -395,6 +398,8 @@ extern "C" {
 
         void espr_serialize(MetaTree tree, SizedBuf out);
 
+        void espr_meta_string(MetaNode *m, SizedBuf str_buf);
+
 // End C++ guard
 #ifdef __cplusplus
 }
diff --git a/espReader/Reader.c b/espReader/Reader.c
index d401909..a40102f 100644
--- a/espReader/Reader.c
+++ b/espReader/Reader.c
@@ -11,6 +11,7 @@
 #include <string.h>
 #include <intrin.h>
 #include <ammintrin.h>
+#include <crtdbg.h>
 
 #include <io.h>
 
@@ -468,8 +469,10 @@ void litcopy(struct str_buf *sb, struct str_lit lit)
 
 void num_str(struct str_buf *sb, unsigned long num, int radix)
 {
+        _CrtSetDebugFillThreshold(0);
         errno_t ret = _ultoa_s(num, sb->buf, sb->size, radix);
         assert(ret == 0);
+        _CrtSetDebugFillThreshold(SIZE_MAX);
         int len = (int)strlen(sb->buf);
         sb->size -= len;
         sb->buf += len;
@@ -629,6 +632,8 @@ Timestamp convert_ts(uint16_t ts)
 
 MetaTree espr_create_tree(SizedBuf in, SizedBuf tree)
 {
+        MetaTree mtree = { .esp = in, .tree = tree };
+
         // create root node
         MetaNode *root = NULL;
         {
@@ -641,7 +646,10 @@ MetaTree espr_create_tree(SizedBuf in, SizedBuf tree)
         struct walker_callbacks cb = { .pre = create_tree_cb, .data = &tree };
         espr_walk(in, cb, root);
 
-        return (MetaTree) { .root = root, .size = in.size };
+        mtree.root = root;
+        mtree.size = in.size;
+
+        return mtree;
 }
 
 void create_tree_cb(
@@ -667,7 +675,6 @@ void create_tree_cb(
         // construct new node
         *m = (MetaNode){ 0 }; // zero/null unused
         m->n = n;
-        m->parent = p;
         m->prev = p->last_child;
         // the linked list of children may not already exist
         if (p->last_child)
@@ -730,3 +737,33 @@ void serialize_cb(MetaNode *m, void *data) {
         }
 }
 
+void espr_meta_string(MetaNode *m, SizedBuf str_buf)
+{
+        // root node
+        if (!m->n.data) {
+                snprintf(str_buf.data, str_buf.size, "Root");
+                return;
+        }
+
+        char buf[1024] = { 0 };
+        struct str_buf sb = { .buf = buf, .size = 1024 };
+
+        switch (m->n.type) {
+        case NT_GROUP:
+        {
+                group_label_str(&sb, m->n.header.group);
+                const char *lbl = group_type_strings[m->n.header.group->type].lit;
+                snprintf(str_buf.data, str_buf.size, "GRUP; %s; %s", lbl, buf);
+                break;
+        }
+        case NT_RECORD:
+        {
+                type_str(&sb, m->n.header.record->type);
+                snprintf(str_buf.data, str_buf.size, "%s; FormID[%08x]", buf, m->n.header.record->formid);
+                break;
+        }
+        default:
+                assert(false);
+        }
+}
+