First I have heard about that problem. I just read the 23 page thread in the giant scale forum and noone had that problem. I have one on hold myself that I will be picking up when I go down to Edmonton next week. going to put a Fuji 43 EI 2 in it. Thought one of my DL 50's would be a little much for it with about 30 lbs of thrust.
Here is the other thread...
http://www.rcuniverse.com/forum/m_5085039/tm.htm