Do minor module bonuses stack?

[Privateer]

Do the modules that add +30 defense or plus whatever attack stack up if you build more of them in a room? Do tactical and LAN modules stack if you build more of them in on the floor? IMO, a lot of the modules need better descriptions, or at least a link to a more detailed description.

[Vexov]

Everything stacks, 99.9% sure. Im not sure for majors, i wonder if that module that increases HP of minors stacks.

[zigeye]

Minor & Major modules stack.

[Case_Number]

I can totally assure you that having 18 H.U.D.'s up in one level stacks and is fully awesome. It's seriously overkill, but it stacks.

[Case_Number]

There is supposed to be something of a mystery to the mechanics to the game. The lack of proper explainations is part of this. You're supposed to just try it all out and see.