Great project Chuck!
Im starting my own build of a P51-D simpit now and have done som research. I will try to build as many of the controls myself, stick, throttle trim settings and include real working gauges. I think I'll keep my old CH rudder pedals for a while.
Me and a friend is currently designing electronics to interface the gauges. I found some car gauges at a cheap vendor here in Norway, most of these gauges are just voltmeters so they are easy to interface. That'll work for all my single pointer instruments. Also managed to salvage some step motors from printers that I'll use for the rest of the instrumentation.
For the stick, throttle, trim and flaps settings I'm going with this great and free joystick controller design:
http://www.mindaugas.com/projects/MJoy16/It provides:
USB interface
8 10bit digital axis
64 push buttons
16 toggle switches
4 rotaries
I'll probably use two of these boards for my setup.
Thought some of this might be of interest.
I also have a question for you
I've got a lot of photographs of the cockpit, controls and instruments but I just can't seem to get any of the dimensions for them, since you've already built a lot of them I wondered if you could provide some of them,
in particular interest as of now is the "throttle box" lenght of arms and knobs on the throttle and the size of the trim wheels, flap lever and seating.
Any other interior measurements you've got would also be greatly appreciated also.
I'll probably set up a web site with pictures of my progress as I get something done....
Please excuse my bad English.
-SAto