Expand the swapping mechanism to cater for different models and permutations. IE: Support for separate model file/meshes as per how squad have done it. This allows modders to install in windows-only depth shader meshes - only if say this mod is installed and have a more open default one for stock if this mod isn't installed by the user. Also, another option to have an additiional mesh as well as the stock overlay mesh. This would cut down on the polys and duplication of the overlay meshes.

#6
Done.