Unfortunately right now it's sort of in pieces, so pictures aren't likely to be a lot of good. If you have questions about specific stuff, though, I can certainly try and work you through figuring out anything that you need.
The G540 blew a driver last year, and I haven't had the time / energy / spare cash to finish fixing it, as my reserves of all three have been going into some fairly unpleasant medical stuff.
Coming up when I have the time / energy / money, I'm going to more than likely rip out the guts of the control panel that I built and start over, using a CNC4PC board that'll just plug directly into the smoothstepper, and some separate drivers for the motors, rather than going back to the G540.