diff --git a/include/blt/gfx/loader/obj_loader.h b/include/blt/gfx/loader/obj_loader.h
index 3072d77..ad75b50 100644
--- a/include/blt/gfx/loader/obj_loader.h
+++ b/include/blt/gfx/loader/obj_loader.h
@@ -129,7 +129,7 @@ namespace blt::gfx
         private:
             bool handle_vertex_and_normals(float x, float y, float z, char type);
             
-            void parse_extra_line(char_tokenizer& tokenizer);
+            void parse_vertex_line(char_tokenizer& tokenizer);
             
             void parse_face(char_tokenizer& tokenizer);
             
diff --git a/include/blt/gfx/model.h b/include/blt/gfx/model.h
index 82dcbfd..778a4a3 100644
--- a/include/blt/gfx/model.h
+++ b/include/blt/gfx/model.h
@@ -50,7 +50,7 @@ namespace blt::gfx
             allocate(size, mem_type, static_cast<const void*>(data));
         }
         
-        void sub_update(GLsizeiptr offset, GLsizeiptr size, void* data);
+        void sub_update(GLsizeiptr offset, GLsizeiptr size, void* data) const;
         
         void update(GLsizeiptr size, void* data);
         
diff --git a/src/blt/gfx/loader/obj_loader.cpp b/src/blt/gfx/loader/obj_loader.cpp
index ddc7d72..ec9f8a3 100644
--- a/src/blt/gfx/loader/obj_loader.cpp
+++ b/src/blt/gfx/loader/obj_loader.cpp
@@ -23,7 +23,6 @@
 #include <charconv>
 #include "blt/std/assert.h"
 #include "blt/std/utility.h"
-#include "blt/std/memory.h"
 
 namespace blt::gfx
 {
@@ -36,11 +35,6 @@ namespace blt::gfx
             explicit char_tokenizer(std::string_view view): string(view)
             {}
             
-            inline char peek()
-            {
-                return string[current_pos];
-            }
-            
             inline char advance()
             {
                 return string[current_pos++];
@@ -79,7 +73,7 @@ namespace blt::gfx
         return x;
     }
     
-    void obj_loader::parse_extra_line(char_tokenizer& tokenizer)
+    void obj_loader::parse_vertex_line(char_tokenizer& tokenizer)
     {
         char type = tokenizer.advance();
         
@@ -121,8 +115,7 @@ namespace blt::gfx
     
     obj_objects_t quick_load(std::string_view file)
     {
-        obj_loader loader;
-        return loader.parseFile(file);
+        return obj_loader().parseFile(file);
     }
     
     obj_objects_t obj_loader::parseFile(std::string_view file)
@@ -141,7 +134,7 @@ namespace blt::gfx
                     parse_face(token);
                     break;
                 case 'v':
-                    parse_extra_line(token);
+                    parse_vertex_line(token);
                     break;
                 case 'o':
                 {
diff --git a/src/blt/gfx/model.cpp b/src/blt/gfx/model.cpp
index a5bc876..1d833bc 100644
--- a/src/blt/gfx/model.cpp
+++ b/src/blt/gfx/model.cpp
@@ -75,7 +75,6 @@ namespace blt::gfx
             return;
         glDeleteBuffers(1, &bufferID_);
         bufferID_ = 0;
-        BLT_DEBUG("Deleted VBO!");
     }
     
     void vbo_t::allocate(GLsizeiptr size, GLint mem_type, const void* data)
@@ -95,7 +94,7 @@ namespace blt::gfx
         size_ = size;
     }
     
-    void vbo_t::sub_update(GLsizeiptr offset, GLsizeiptr size, void* data)
+    void vbo_t::sub_update(GLsizeiptr offset, GLsizeiptr size, void* data) const
     {
         bind();
         glBufferSubData(buffer_type, offset, size, data);