Hey guys! I finished my DK Jr.-inspired cabinet recently (seriously, I'll start a thread on that one some day), and am already on to my next project. I love the way the DK turned out, but it's a single-player machine and I always wanted to do another one for two players.
The friend I bought my DK from was selling a Midway cabinet that contained Gauntlet: Dark Legacy at the time, so I checked it out. The cabinet was in good, solid shape, a similar size and form factor to the Golden Tee but in better condition, with a big, good-looking monitor free of burn-in. I bought it at a very good price, and got it home (minus game board and marquee) a few days later. I found stickers on the back that said "Midway Universal Cabinet 40135." So I'm guessing it was just a generic cabinet that any number of games could be stuck into? Good for me, because now I feel no shame MAMEing it. If anyone knows anything else about these cabinets, though, I'd love to hear it.

Interesting beveled shape on the front. The right front side has a detachable access panel that clamps on from the inside.

Gotta love those graphics on the side.

Anyway, the next step is to start collecting parts for the control panel, etc... and here's where I need some help, because this will be very different from my previous machine that used a PC monitor. Here's the controls I want to put on the machine - I'm going to keep this simple:
2 Happ Supers - I just like the feel of these and don't need P360's or anything.
7 player buttons for each side
P1/P2 buttons and a few other service buttons
Trackball.
That's it. Note that there's no dedicated 4-way joystick - that's on the DK machine. Also, I don't think I'll need a spinner (unless someone convinces me I'm really missing something by not including one).
But what I need more help with is how to wire things up. I didn't put a trackball on my first machine, so I don't know what kind of encoder or other parts I need. Is there something from Ultimarc that handles both the traditional controls and the trackball? I don't need both an Optipac and an Ipac, do I? Also, what is the J-Pac traditionally used for? I checked saint's book but didn't find exactly the information I needed.
To connect a PC to the arcade monitor, do I need the ArcadeVGA? And finally, is there a good guide to wiring this all up (including the speakers, marquee light, etc)? I did find the Bob Roberts link (
http://www.therealbobroberts.net/acwiring.html but wonder if there are any other resources to consult. This project will obviously be more involved than my last, with more to consider.

I think this is a 27" WG U5000.
http://www.jomac.net.au/WG-U5000.JPG 
Here's a pic of the side of the monitor.

And finally, a shot of what it's got inside. There is a JAMMA harness in there somewhere. Everything looks to be in good condition.

If anyone wants to see bigger pics of anything, please let me know. Thanks for your help!
Eric