Q-Ball,
I would recommend you read the entire thread on the RB. There are some important factory issues that need to be corrected during assembly. These guys have done an excellent job of reporting on these as well as developing the fixes.
The major problems are in the retract mounts tearing out in the wings, the horizontal stab breaking and also the excessive downthrust. There is speculation that the downthrust may even cause or at least contribute to the stab failures if I recall.

The thread is located here: http://www.rcuniverse.com/forum/m_16..._1/key_/tm.htm

Good luck with your Bear.