David- Thank you for the positive feedback. I sometimes wonder if I overdo the details. I am glad to know they are of value to others. That's why I do it.
Doxilia- I still fly the C-VII in my .50 pattern arf practice plane. I bought it new in 1987. It has countless hours of airtime,and continues to serve me faithfully. I cut off the handle on the trainer switch for the very reason that you stated. The original airborne pack is deep in the bottom of lake Tahoe due to an alcohol related (R/C) seaplane misadventure, many years ago. This radio is not going in the Vertigo, I have a new Futaba 7C on 2.4 GHz with JR DS 821 digital servos. The spektrum module idea is intriguing.