ALZRC swapped in a 5mm tail shaft and the Devil 380 tail unit. Nice idea but every component in this assembly has major machining issues. tand being a 5mm shaft it's basically impossible to swap in another assembly to get you flying, you are 100% locked into ALZRC. The only fix is to replace the entire tail box assembly with a MSH protos unit and at well over $100 when buy all those part you still have to then sort the main shaft, rotor head and rubbish bearing issues. This assembly is not repairable as the main machined parts all have QA machining issues that can't be fixed ! unbelievable that such rubbish is been sold.