For just a few bucks more the 425 is a double ball bearing version. I just moved some of these to a new trainer. The old one needs to be recovered but had 3 to 400 flights with various pilots over the past 2 seasons. I had marked the servos into service in 1998. Really good value (about $15.00 street and less in quantity from some suppliers). I also run these in my Pizazz and other palnes up to 0.60 engine size. Running 545's in the UCD-3D except on the rudder (JR4721).

EXCAP232