Cab has been in a relative state of completion for some time, but I've recently been coerced into creating this thread. I'll start with recent pics, and work backwards.
"Finished" cab. Mess of wires on top is actually a currently unused AimTrack. Left of the cab, the Atari labelled tube is a Centipede wall sticker thing waiting for a home. Bottom-right, the gears and attached crap on the floor is a temp hacked mount for the elusive ram controls star wars yoke. Coin-door: I replaced the default/ugly coin rejects with some blue and red to match the overall theme, (from Happ via theplaydiumstore). I then made custom LED based lights for them (detailed in a thread somewhere), as the default bulbs really suck. USB based display embedded in the control panel. Was driven via MameHooker, but now switching over to a raspberry-pi (wip) and custom software - this gives me the animated displays I want, while not competing with Mame for the CPU. Spinners on left and right are actually GGG turbotwists with Ultimarc tops (I had to drill the tops a bit to fit the shaft). Spinner in centre is the GGG push/pull. Not showing anywhere is a small rocker-switch on the top of the cab which controls all the power to the built-in outlets - a master power switch.
Please ignore the surrounding mess.

Got these from CoryBee - just held on with carpet tape for the moment, will do something better later.

Now, the embarrassing rats nest - i really need to clean this up some day. Two LED-Wiz's, two optical encoders, four U360's (only P1+2 wired to keyboard encoder), thrust vector keyboard encoder w/ expansion board, happ stick with the tron restrictor and GGG's tron handle replacements. Replaced U360 handles with hollow ones, glued the magnet to the bottom - this sucks as the wires tend to wrap around a lot, and I have to fix them often

. Buttons lit with Paradise led's, which dont snap in as advertised - these are all hot-glued in.

Bottom of the CP box. This pic, just taken, is already out of date. I've since wired wired the raspberry pi, and cleaned up a tiny bit:

The guts. You can see the little circuit I made to control coin counters, which I've attached to each coin-mech. Those puppies eat 24V iirc, so I needed a separate pwr supply and opto-isolators to keep it all safe. Needless to say then, coin door is fully functional, but admin panel also has coin buttons. The network hub allows me to connect the main PC and the raspberry-pi together, and put them on the interwebs if I want. The pink box is a cheap amp, accessible through the coin door if need be. Running Cabvol, so the need is pretty much non-existent. Got a std pwr receptacle in there (the very shiny metal box top/right) - the grey item plugged into it is one of those relay based thingies - so when I power up the PC, everything else comes on as well (e.g. screen, marquee light). Got it at HomeDespot, good for tools (e.g. turns on the dust collection/shop-vac when tool comes on). Blue horizontal line near top is the edge of my keyboard. Computer on the left. Not visible, to the right, is the Q*bert knocker and driving circuit - thanks again to MameHooker, this thing is awesome.
