what radio are you using? If it has EPA, that should solve the problem, but if its stock, it doesn't have epa.... As for the tubing, yea I would definitely trim in. Its there to give the servo a little "wiggle room" in case the servo arm wants to move further than the linkage will allow... having it bunched like that compresses it and takes away that wiggle room. That could be the whole problem right there.... I would fix that first and see what happens... what is the distance from the outside of one collar to the outside of the other... it should be 26mm