ORIGINAL: nonstoprc
I found myself that I need to replace the gear set for 1 elevator and 2 split rudder 9650s on my Passport, after 1.5 season (about 150 flights in total). All three have some centering issue.
The stock 9650 gears are nylon, and I wonder if there is metal-type substitute.
The other alternative is to replace 9650s with some other choices. What elevator servos are you using?
You could replace them with the BLS153 servos. They are the same footprint as the S9650 but without the mounting tabs on the sides.
Cheers,
Jason.