I have a GM811G with spring loaded worm. I've found that increasing RA aggression is key to keeping the RA in check. I'd experiment with that value and see if it improves things. I've found that I can go above 100% for best results. My last try it was something like %135. I'd also recommend not making the RA clutch too tight. Make it just tight enough to prevent it from slipping in any position the mount may be in. The clutch screw puts pressure on a bearing, and I imagine that it could cause stiction if too tight.?
Jamie
Jamie Amendolagine