Did you build that cab? Got any plans for it?
It is (was) a completely gutted Atari Red Baron Cockpit
Does it play as good as it looks?
Plays really nice. The sub-woofer and force feedback wheel feel great...and the fact that it is a Dreamcast, all the controls are right on the wheel. I left the pedals free so that they can be moved all the way back for me, and all the way forward for the kids (with a piece of wood cut to size to stop the pedals from sliding back)
Would you build another driving cab?
Doubt it...but as time goes on, I may replace the Dreamcast guts with a PC or PS2 for a wider selection of games. The wheel assembly is pretty modular and I could replace it quite easily.
It doesn't look huge - how long is it?
It is about 5 1/2 feet long. Also if you look closely, you'll notice the original was designed to break into two pieces...well almost. Although there is a clean distinction of front and back on the side panels (t-molding goes all the way around a front quarter panel and rear quarter panel), and on top, for some reason, the entire floor is made from two solid 5 1/2 ft pieces of plywood which are attached together by a series of 2x4s (on edge) to form a somewhat hollow floor (this where the wires run from front to back). I searched high and low for a clean breakpoint in the floor to no avail. I ended up running 2.5" circular saw across the floor right at the two visible (black t-molding) joins and it broke apart nicely (and it turns out there wasn't any clean break point). I then reinserted a couple of 2x4s to give it back its strength and can now assemble/disassemble at will with a few screws. I had to get this baby upstairs and around a corner and wasn't going to go in one piece. You'd never know by looking at it that it has be halved.
Any links or other advice regarding that cab?
Advice...just hold out for the right cab...make friends with the local operators...and just have fun

Wanna sell it? 
Sorry...but all in all, the cab cost me $75 (delivered), DC and whell cost next to nothing from a local pawn shop, 20" monitor was free from the local "freecycle" group, and decals totaled about $20 on a bulk buy on ebay...there are close to 60 decals on all sides combined. Paint was leftover from cocktail project. Probably the cheapest cab I have put together.
Nice gameroom. I know it's making lots of us drooool. I like what you did with the classic consoles. How'd you convince the little lady of this necessity? She must be a bigger arcade nut than you!
Thanks. The deal when we bought this place was that one of the rooms was mine, and she got the rest. I see now that I should have held out for more room
