I posted a thread last week asking for help with a porposing slow stick that my bro-in-law receintly put together. It seemed that nothing we tried as far as changing the CoG, or moving the wing back and forth would stop the thing from bobbing its nose up and down. Well we were out on the runway trying out yet another CoG change & when checking out the control surfaces for correct movement, we noticed something. When the elevator was moved to the up position by moving the stick back, the elevator would move and then after about 1 to 2 seconds would creep back toward neutral even though the stick was still being held back [X(] It never went back to neutral but went back ~ 50 -75% of the way. Yikes!!! So not knowing if the peoblem was in the Rx or the servo, we switched the servo connectors on the Rx. Now left & right stick actuated the elevator, and the problem still existed. BAD SERVO [:@] Slap in a new servo, reset to the recommended CoG, and wa-laaa. Flies like a champ. Thanks to Glacier Girl who tried to help with your suggestion. Your time is greatly appreciated!! Happy flying.
Rick

you also have to watch for putting on the wrong size control arm on the serov, some come with 2 sizes, one appears to fit and its fairly tight but will slip under pressure