I concur with using the DS821’s. I had them on all points until I was finding that the posts were breaking when I stressed them on the elevator. Luckily I never had a complete break while flying. The problem turned out to me not the servo; NEVER use Loctite on those plastic posts. I changed out the servos to metal gears/posts and you can read about it in an earlier post. The reason I was using Loctite on those and not the ailerons was I knew I could check the ailerons after each flight easier than checking the elevator and rudder. Reading all these recent comments reminded me I forgot to update the group on the problem.

I still think the Saito 170 radial is the best motor for the aircraft. It lets the aircraft perform as a Super Stearman and sounds great. If they ever offer a Gas conversion for that engine I may consider changing. With the Keleo exhaust the oil is not an issue. Some people have said it does not work with smoke but I don’t know because I don’t run smoke on any aircraft.

Just some of my thoughts worth every penny you paid for them.