Hey, I've had this same conversation with myself before.
I got a gutted PolePos cab from a friend and "rebuilt" it. Got the PolePos CP, glass and marquee cheap on ebay (more than you paid tho!) A little mousehack here and wire wire there and I had a 360 wheel MAME driving machine.
It was fun. For a couple weeks. =\
The games never felt quite right, no matter how much I tweaked the settings. And there just aren't that many really really cool 360 wheel games. So, I played my fill of PolePos2, Off Road and Super Sprint and decided to make a fighter CP.
After much hesitation I removed the wood support when I MAME'd my PolePos cab. I tried to save it, but it just looked goofy, so I ripped it out (it won't come out easy.) After that, a couple L-brackets later and some MDF later the deed was done.
Honestly, it looks awesome, almost like a thick Asteroids cab. I kept the glass and marquee intact, and plan to someday to make a PolePos themed CPO. =)
I also kept the pedal wired up. =) Hey, why not? Someday I do plan to build a Happs wheel I got off of a PolePos that was converted into a World Rally I salvaged from a trash pile (the cab was a loss tho.)
I'm way happier with it now.