I have the same problem. Up to jump two meters long jump, and I destroyed the rear bulkhead 8x. RPM from my shoulders and otherwise on the REVO very careful care. This is the only issue that worries me very much.
I finished reinforced but I do not see a change for the better.
http://wgeronimo.rajce.idnes.cz/Lama...ULHEADU/#album
At a temperature of 5 degrees Celsius, I broke the whole chassis. But it was a very big leap.
http://wgeronimo.rajce.idnes.cz/Jak_...8102009559.jpg