ModularGrid Rack

This is my general suggestion. A few tweaks here and there, plus some utilities, and the overall concept works fine. Some of the really big modules are questionable, but I also have really big modules and love them, so I won't bother questioning it. If you have any questions, I can answer them, but I do think every module type included here is necessary to make this work as you intend.

Also, I made it 104hp. 104hp is easy to get. 100hp is not easy to get. You'll pretty much have to make it yourself. Why torture yourself to have less space?

edit: The thumbnail doesn't seem to want to work properly. Just click on it and the rack should appear normally.