I had the TT pro90 in mine.

It went down after 5 min in the first flight.
Stab totaly exploaded in the air, and YES, we had put it together as the manual said.

My second Bear is almost ready now, and have mayor mods on it.

We even found a error in the elevator, something that I have not read on this thread before.

This is a dangerus type of ARF. Do NOT fly it before stab is rebuilt.

My 2 cents.

Regards