RE: Parkzone Stinson Reliant SR-10
I used the recommended PKZ1090, it has plenty of torque and drives the flaps easily. As a matter of fact, I accidentally over-drove it while setting up the 3 position switch on my DX7 and it ripped off the wing! When installing, I exercised the flaps by hand and then tried using the end hole of the servo arm for the linkage. There was not enough torque to lower the flaps, so I moved it to the 3rd or fourth (can't recall) hole from the end of the servo arm and it works fine. I was able to get the full 25 mm throw.
Rocky