CAREFUL! making it as tight as possible is WORSE than too loose, you'll strain the main motor, tear up gears, possibly damage (maybe even swell!!) your battery, and really cause a heck of a time for yourself. too tight isn't good, now, what I've found is that if you put just two miniscule drops of CA on the tail assy at the beggining of where the tail boom slides into the tail rotor frame, it keeps that from sliding. to remove you just remove all the bolts back there and slide a small (jewlers) scredriver with the very fine knifebladeish tip into where you see the belt and just work it towards the CA joint, once you put enough pressure pulling the two tail pieces apart they snap nicely off the tail boom with no harm to either piece because CA doesn't stick to smooth metal too well. Even though it doesn't stick like on plastic, it does keep the thing secure.