Ok I'm pretty new at rc airplanes but I've been flying a Arrow and LT40 both fly great with no problems...I purchased a great planes cg machine and balanced two new planes a us aircore colt and hobbistar mkiii 60...both planes nose over on takeoff's but according to the cg machine are perfectly balanced...set on the machine with both rods in by fuselage and at the cg as recommended....the hobbistar manual states they needed 2.5pz's of weight for protptype on tail mine has almost 4oz's of weight on tail.....but noses over bad...also both planes when nosing over wing tip to the left.....I haven't removed the weight and tried unbalanced cause I guess this would causse a problem...I have however balanced the Arrow in the same manner and it nosed over on takeoff and wintipped to left...I removed weights it flew?....Any suggestions? As I'm seeing this now the Great Planes CG machine sucks and doesn't work.