Well, I built a Ultimate Arcade II from MAMEROOM.com.
I modified the design so the top, bottom, and control panel are 3 detachable pieces.
the top (which really is separate and connected only by 3 screws anyways), was built, reinforced, and attached to the bottom by 3 bolts on either side in a triangle configuration, that were sunk & painted black. Nuts & Lockwashers were used on the inside.
The control panel itself is a separate entity with a hinged top. It fits onto the frame that juts out in the front, and is secured to the body by inserting 4 bolts (2 on each side) through holes in the bottom, which also go through holes in L Brackets I have secured to the inside of the cabinet frame. I then take reach underneath (with the keyboard drawer out of the cabinet), and screw on 4 wingnuts. I then slide the keyboard drawer back onto the rails. the control panel is connected by using 2 25 pin parallel cables and a 15 min monitor cable.
I can take the entire cabinet apart into its 3 pieces in a matter of minutes.
If you want details/pictures let me know .. PM me-
--NipsMG