Xairflyer, what turbine do you have in yours? I'm repairing a turbine conversion at present with a Wren 44.

My canopy has a fixed pin at the front & a sliding spring catch at the rear. It was not very secure due to the canopy flexing but I had to repair the canopy so I glued some 1.5 mm balsa from front to rear & it's now fine.

Mine has one, flat Hitec digital; servo in one of the booms with a very short linkage to the elevator. - John.