I am not having much luck with my TT46PRO engines. The first one dropped the rear bearing cage at 3 hours. The second one has a stripped thread in the crankcase in one of the backplate retaining cap screw receptacles. I've used Darrol Cady's torque driver everytime I've tighted those threads to 13 inch pounds - so I am sure that they have not been over tightened.

The worst bit of this back luck story is that I've been getting my engines from Tower Hobbies - and have discovered that Thunder Tiger don't have any international warranty and neither Tower, the USA distributor or the Australian distributor want to know about it. I've had a complete run around from Tower, Ace Hobbies (USA distributor) and Thunder Tiger in Taiwan. I've had to actaully call people as no one will return emails when you start asking about warranty. All in all, not a good look.

A lesson here for anyone buying TT engines internationally, you have no warranty!

Enough of my problems - what I would appreciate some advice on is what people do when they strip threads in the crankcase - as I've got here with my backplate retaining screw receptacle.