Hey Scott,

What was found out very early on in the 8611 was that the top case was cracking where the bearing sits when the servo was used in extreme 3D applications. Flying them in jets, and other models has never been a problem.

The difference between the two is the new upper case which has enlarged bosses around the bearing holder, a newer motor with more torque, and a different amp to handle the upgraded motor. Either servo will work fine for us in the jet arena.

Hey Wex,

all of my experience tells me one of your flap linkages isn't delivering the best geometry and mechanical advantage. IF you adjust it will go away. On teh other hand, the nice thing about the 8611A is it is so robust it can handle the smaller items when we miss a bit and it will not be effected during operation if it bounces a bit when idle.