Sunny

IMHO you ought to get rid of those turret connectors to the elevators and anywhere else you have them, perhaps they are OK on the throttle but they are not reliable enough for a patten ship, go for 3mm ball links for the best control.

The next time you put servo's at the rear for elevators try to get the pushrod parrallel to the tailplane to ensure correct geometary for both up and down operation.

Mike