I got a trainter about 4 months ago and I had a h3!! of a time getting going. I have a buddy that is a experienced flyer and we couldent get the stupid eveloution .40 engine to run for crap. so we straped a os .46 to the arrow I think it was. long story short I crashed it after about 20 min and there it sits as a pile of tooth picks. Hope to get back going soon tho.