Hey Bicyclemonkey,
Was wondering which servo you show mounted? Throttle?? Love those adjustable arms, and have used them a lot - but mostly on 40 sz planes .
Do wish someone would make a good stiff metal one with mabey the bottom part being adaptable to fit many different splines.
TH has their TL150's on sale which is what I was thinking of using. Plan on running many different engines and suspect some will put plenty of stress on control surfaces.
T-man49 in Al
Spitfire 19, P38 16
Saito 723, BUSA 37
Sig 24, Glow 33