That's odd about the buddy boxes, I've never seen that happen before. Did you try various cables?

As for subtrims and the stuff, when using a buddy box, you have to trim the airplane the old fashion way. That means turning clevises and adjusting servo arms and what holes on the servo arm and control surface you use to get the right trim and throws.

All these young wippersnappers, why back in my day, servo reversing was luxary. 6 channel transmitters advertised in BIG LETTERS that they had reversing on _4_ channels, and we thought we had it good. Sheesh! [X(] (wide open spot here for someone who actually flew escapement.....)