I can relate to your comments for the most part but in my case I disconnected all the servos except the JR 8611 on the rudder channel and it still jumped. You're right that the JR's sound way smoother than the 5945's.
ORIGINAL: JettPilot
I got a HiTec digital servo for another project I am building and it was horrible [:'(] I put it on the elevator channel of my current plane and it worked, by design it is very rough and grindy sounding compared to my JR digital servos (obvously lower quality), I was a bit dissapointed but for the money I could live with it... I put it on the Throttle channel of the same plane and it would not work at all, or just jerk around sometimes [X(]. I put my JR digital back on that channel and it was perfect. This is top of the line JR setup I have been flying for years, and never a single glitch, but the HiTec servo glitches, doesnt work etc [:@]. I started to read the forums and read about a lot of crashed planes due to HiTec digital servos doing weird stuff [X(]
MY JR digitals cost 120 each, overpriced but they work PERFECTLY. I really wanted to use the Hitecs for 50 bucks, but I will save 70 bucks on a servo and crash my airplane, I will NEVER buy another digital Hitech servo, they are just to squirrely and unreliable.