i took my hangar 9 super stick out again last night and im having a little trouble i had a 12 x 8 prop on it (.61 os) and when i went to take off it dug in the ground and wouldnt work so i put on a 11x7 (was this ok?) then i didnt think it was going to ever get off the ground it took the whole 300 yards or better runway i have mowed! but when i finally got in the air and timmed it out it kept wanting to nose dive i adjusted the trim all the way and it still kept noseing down ! i adjusted the cg and it was perfect according to the manuel but it sure seems nose heavy in flight if it was nose heavy would it cause the problem taking off? i dont know what to do because i dont know how much more weight to add to the rear since it balances so good!! help!!