diff --git a/Makefile b/Makefile
index def1c28..f81198e 100644
--- a/Makefile
+++ b/Makefile
@@ -1,5 +1,5 @@
 CXX=g++
-CXXOPTS=-Og -ggdb -Wall -Wextra -pedantic -Wno-unused-function -Wno-unused-parameter -Wno-sign-compare -std=c++11
+CXXOPTS=-Og -ggdb -Wall -Wextra -pedantic -Wno-unused-function -Wno-unused-parameter -Wno-sign-compare -std=c++11 -flto
 LDOPTS=-flto
 LIBS=-lglbinding -lSDL2 -lSDL2_image -lobj
 CXXSRCS=main.cc objectParser.cc
diff --git a/Object.hh b/Object.hh
index a235bcb..77c7e4f 100644
--- a/Object.hh
+++ b/Object.hh
@@ -21,9 +21,13 @@ public:
     construct(std::get<0>(tmp));
   }
 
+  Object(Object const& copy) = delete;
+  
   ~Object() {
     glDeleteVertexArrays(1, &_vaID);
   }
+
+  Object& operator=(Object const& copy) = delete;
   
   void draw(glm::mat4 const& modelview, Program *override = nullptr) const {
     glBindVertexArray(_vaID);
diff --git a/VBOManager.hh b/VBOManager.hh
index feedfb1..da61f8d 100644
--- a/VBOManager.hh
+++ b/VBOManager.hh
@@ -40,6 +40,9 @@ public:
       move._vbo = nullptr;
     }
 
+    VBOAlloc(VBOAlloc const& copy) = delete;
+    VBOAlloc& operator=(VBOAlloc const& copy) = delete;
+    
     VBOAlloc& operator=(VBOAlloc&& move) {
       _vbo = move._vbo;
       _ofs = move._ofs;
@@ -103,10 +106,22 @@ private:
     }
 
     VBO(VBO const& copy) = delete;
-
-    VBO(VBO&& move) : _bufID(move._bufID), _allocs(move._allocs) {
+    VBO& operator=(VBO const& copy) = delete;
+    
+    VBO(VBO&& move) : _bufID(move._bufID), _allocs(std::move(move._allocs)) {
       move._bufID = 0;
     }
+
+    VBO& operator=(VBO&& move) {
+      for (auto ent : _allocs) {
+	assert(!ent.used);
+      }
+      if (_bufID)
+	glDeleteBuffers(1, &_bufID);
+      _bufID = move._bufID;
+      move._bufID = 0;
+      _allocs = std::move(move._allocs);
+    }
     
     ~VBO() {
       for (auto ent : _allocs) {
diff --git a/shaders.hh b/shaders.hh
index 7e14ccd..0b77257 100644
--- a/shaders.hh
+++ b/shaders.hh
@@ -34,8 +34,7 @@ public:
   Shader() : _shaderID(0) {
   }
   
-  Shader(std::string const& program, GLenum type) {
-    _shaderID = glCreateShader(type);
+  Shader(std::string const& program, GLenum type) : _shaderID(glCreateShader(type)) {
     const char* const arr[] = {program.c_str()};
     glShaderSource(_shaderID, 1, arr, NULL);
     glCompileShader(_shaderID);
@@ -62,12 +61,11 @@ public:
     glDeleteShader(_shaderID);
   }
 
-protected:
   unsigned getID() const {
     return _shaderID;
   }
-
-  friend class Program;
+  
+protected:
  
   unsigned int _shaderID;
 };
@@ -78,7 +76,7 @@ public:
   VertexShader(std::string const& program) : Shader(program, GL_VERTEX_SHADER) {
   }
 
-  virtual ~VertexShader() {
+  ~VertexShader() override {
   }
 };
 
@@ -102,9 +100,8 @@ public:
 
 class Program {
 public:
-  Program(VertexShader& vertex, FragmentShader& frag) : _geom(nullptr), _vertex(vertex), _frag(frag) {
-    _progID = glCreateProgram();
-    
+  Program(VertexShader& vertex, FragmentShader& frag)
+    : _geom(nullptr), _vertex(vertex), _frag(frag), _progID(glCreateProgram()) {  
     glAttachShader(_progID, _vertex.getID());
     glAttachShader(_progID, _frag.getID());
 
@@ -131,9 +128,8 @@ public:
     glDetachShader(_progID, _frag.getID());
   }
 
-  Program(GeometryShader& geom, VertexShader& vertex, FragmentShader& frag) : _geom(&geom), _vertex(vertex), _frag(frag) {
-    _progID = glCreateProgram();
-
+  Program(GeometryShader& geom, VertexShader& vertex, FragmentShader& frag)
+    : _geom(&geom), _vertex(vertex), _frag(frag), _progID(glCreateProgram()) {
     glAttachShader(_progID, _geom->getID());
     glAttachShader(_progID, _vertex.getID());
     glAttachShader(_progID, _frag.getID());
diff --git a/texture.hh b/texture.hh
index e4f62cf..b12c5da 100644
--- a/texture.hh
+++ b/texture.hh
@@ -24,7 +24,7 @@ static unsigned ilog2(unsigned in)
 
 class Framebuffer {
 public:
-  Framebuffer() {
+  Framebuffer() : _fbID(0) {
     glGenFramebuffers(1, &_fbID);
   }
 
@@ -51,7 +51,7 @@ private:
 
 class TextureCubeMap {
 public:
-  TextureCubeMap(unsigned size) {
+  TextureCubeMap(unsigned size) : _texID(0) {
     glGenTextures(1, &_texID);
     glBindTexture(GL_TEXTURE_CUBE_MAP, _texID);
     
@@ -106,11 +106,11 @@ private:
 
 class Texture2D {
 public:
-  Texture2D(unsigned width, unsigned height) {
+  Texture2D(unsigned width, unsigned height) : _texID(0) {
     _glCreate(width, height);
   }
 
-  Texture2D(std::string const& file) {
+  Texture2D(std::string const& file) : _texID(0) {
     SDL_Surface *surf = IMG_Load(file.c_str());
     if (!surf)
       throw SDLException();