because they will sucker you into building one for them.
I got talked into building a DDR replica for a relative for a christmas present.
As with all projects, I started by mocking it up in ACAD. Having no real measurements to go off of, and the fact that I'd feel like a schmuck at the Dave & Busters with a tape measure, I did what consultants do best.
I made it up.
Going from pics, I made a rough guess at sizes. Came out OK, so far.
Anyway, I've got the cad files available if anyone else is interested.
Pics are in my cluttered workshop, where, due to massive stupidity on my part, the first modification to the plans involved cutting the cabinet depth down to 27 inches when the plans called for 30 inches.
Guess how wide the basement doors are.

Ed