I finally stopped playing my new cab long enough to take some pictures of my spinning control panels.  I thought I'd post them here and get some feedback.  I started this thing back in December (if you look at my web page the first few pictures show about a foot of snow on the ground  

), then had a 4 month delay with family/job things.  Anyway, the cab is about 95% done.  I just need to finish some painting, add a marquee and bezel and it's done.  These panels work great, things spins like a top and once locked down (2 eye bolts on the side which quickly spin in/out) it is as sturdy as if the thing was completely bolted together.  Having 3 sets of panels hooked up to 1 I-Pac creates a lot of wire spaghetti in the guts of the machine!  The monitor spins as well.  I'm now searching for a good front end that I can filter the games based on controls and monitor orientation.  The three panels I have are:
1 player panel with an 8 way J, a 4 way J (for pac-man, etc) and 6 buttons.
2 player panel with 2 8 way's each with 6 buttons, and a trackball
defender/asteroids panel with an Oscar spinner.  Defender  is my favorite game and I wanted one panel to be the exact layout of that.  Asteroids is another favorite, and since the layout is exactly like Defender with 1 extra button I added that so it also doubles as an Asteroids panel.  
Here is a picture of the 3 panels.   I loved the picture I came up with for the panels when I made it, but after printing and installing I'm not completely thrilled.  Some day I'll re-do the pictures, maybe have a different picture on each panel....