RE: 3d flying upgrade
as long as you are comfortable with the funtana let it eat.. after you get some time on it you will get more comfortable with it.. im assuming you allready know how to hover,tork roll ETC. if so you should soon get the "non foamy feel" for lack of words to describe it. if not i would 3D practice on the foamy since the mistakes are cheaper to fix. but continue to fly the funtana.