RE: Fiberglassing the airplane questions.
Alex
I just got a pair of those. Mock them up on a test stand and start making your adjustments and get to know what they need to work. The servo I'm using is the Nitroplanes MG 995 standard digital servo. rated at 200 oz. I have programed my radio to slow it down and travel to work well. It is not a retract servo. The only problem is the mounting holes don't line up with the retracts holes.
I may put a set of these in my CMP P-51D 70" span.
Steve