We are trying to use the Endurance RC PT-3 system to move around a sensor package that weighs about 2.15 lbs. However, when we try to run the two servos in the tilt section, we get a constant chattering/jittering from the servos, even when there is no load. I've tried to realign the servo horns, but to no avail. I cannot get a smooth motion from the tilt mechanism, no matter how much I adjust trim settings or the P. Mix in our transmitter. My only other option seems to be using a Y cable adapter and manually modify one of the servos to run in the opposite direction, but I really don't want to have to rip apart a perfectly good servo, or have to buy a new one (if I did, I would have to figure out how to retrofit a single motor to the system in addition to getting a bearing where the opposing motor used to be). Does anyone have any suggestions? We are using a Hitec Aurora 9 transmitter and a Hitec receiver.