My brother has had a few rough landings and then landing skid glue sessions, enough that he up graded to the aluminum skid. The heli flew fine befor but now it hardly will get off the ground with its new skids on. Its not that batteries as I have tried them on my HB and they are fine. I have read many post but no one seems to have run into this problem with the upgrade.. Any ideas? Also is there better than stock motor you can run in the HB MK3 with the stock 4 in 1? Thanks for any and all help