About this 3D model

I built these to serve as scale models for a project I'm working on. I wanted to absolutely confirm that they'd fit together as intended before I spent a bunch of money on materials and wasted a bunch of time. In the STL files, each component square is about 1 3/8-inches across. As long as you keep them at the same scale, they'll join together as you'd expect. I don't expect this model to change much. It was created in 123D Design. If you'd like the original source files, leave me a comment and I'll post them.