normally they dont put the best quality retracts in those kits.your control rods should have a little amount of free travel left when they go from lock to lock.like Flying freak said you dont want the servo to bind.i would try to adjust the locks more so in the down position than up.the further you adjust the slides just short of end of travel without binding the rod that will take some of the slop out of them.if they are just a cheap set you might not be able to at all.just mess with the rod adjustments and see what happens.