Heads up on the 250 clone from value hobby...........went together OK....missing link balls first problem..... next flybar threads almost none existent.........had to drill out flybar paddles and jb weld them on.........belt stretched and snapped...boom was also loose because the boom holder would not thighten down....had to ca end of boom to increase O.D. of tube.......... broke landing gear on soft landing hop.....and also broke link ball off blade gripe, because there where no threads on it....the ball was glued to blade grip from the factory.............replacing with 250 trex........don't waste your money......POS.........Bill