Yeah I use blue threadlock on all metal to metal screws. Its also true that RTRs build quality is pretty poor. I've had 2 RTRs in the past and each of them had similar problems. Now I buy kits and wouldn't go back. I'd rather have a cheaper kit and budget engine put together properly than a flashy RTR that just falls to bits and has generaly poor quality components.
Its alway hindsight that teaches us lessons and I dont know of that many people that keep buying RTRs. Usually you buy 1 or at the most 2 when your new, then see the light and buy kits.
Has anyone had more that 2 RTRs and still not turned to kits?