Well, it is up and running!
I still have the LED's to put in when they get in, and a ton of programming to do for lighting. And I still have a few dozen games I would like to add, as well as some other emulators, etc, but that will happen over time.
I had to work out a few glitches, but nothing major. One oddity was when I was first configuring the ipac ultimate, I had the trackball plugged in and the X axis was backwards. I verified that I had the unit facing the right direction and the up-down worked but the left right was backwards. So I swapped the pins on the connector for the two X axis controls and it was perfect. But when I got it all plugged in last night, they were backwards again. This is something like how when you go to plug a USB in and it doesn't fit so you flip it and it still doesn't fit, so you flip it again and it fits.. wtf.. Anyway, swapped the pins again and it works right now.
I mentioned above that I made a design decision to put the spinner closer to the bottom of the CP instead of above the trackball like most people do. This seems logical to me for a lot of reasons, and I ended up shifting it to the left so there was more room for using the trackball. This is fine except for one thing - the spinner knob is big enough that you sometimes touch it when using the trackball, and then it moves the x axis a little, screwing up whatever you are doing. Easy solution really, just pop the knob off when playing with the trackball. But still kind of a bummer that it interferes slightly. Wish there was a lock for the spinner when not in use.
I am still trying to work out how to get the u360's to work in Demul, but otherwise things are all working well. Excited to get LEDs in..
Here are pics:
With the CP and keyboard drawer open. Surprisingly stable even like this, thought it might be front heavy but it isn't. I added a stay for the cp so it will lock at 90 degrees when open. Already came in handy.

Here is a pic of the back with the panels on. I added a toggle switch for the marquee so I could turn it off while playing.. I also have a PWM dimmer for LED strips coming so I can dial down the intensity, it is too bright.

Here is a pic with a game running, marquee turned off for the sake of a better picture.

Here I the front end. The 27" monitor I got doesn't actually support 1600x900, which was what everything was set for. This is odd since it is a 1920x1080 screen, but if you go to 1600x900 it switches to an odd resolution and squishes the image. So I reconfigured the layout really quick to fit the 1920x1080 resolution. I might have to tweak it a little, the snap is a little too big still. But MaLa is so damn easy to adjust.

One more view of the whole unit. I am very happy with the overall look and feel, and the back corner "wings" make it look like it was built to have the big control panel. (they are great for setting a phone or beer on too while playing)

I will get some pics after the LED's are installed, but this about wraps it up. I have a few people interested in this now so I might be building a few more soon. For now I just want to move on to other projects and get more off my plate so I can take some time to relax and enjoy it all. Thanks to everyone here for the positive feedback and the compliments. Also thanks for the resources, I couldn't have done all this without this forum to help.