Hi, Chad.  If you get stuck, e-mail me.  I sort of remember how Jim did it as we talked about it at the time.  I think it could be done more simply with modern radios, and perhaps a little more scale in the way the flaps worked, as they were coupled to the throttle on the full scale.  Not mechanically, but because the full throttle prop wash blew them up from the full down position on take-off.  There was a WW II training film Jim had that explained it all.

Jim and I each have Don Lien F6F's to build, I swear I'm gonna do that one right after the Dart.  It's been sitting around here, engine, gear and all for nearly 20 years.