Hi Ken
The only way that mine will hold a knife is wide open and into a good strong wind, then only for about 100 yards or so. I think SIG needs to remove the part of their ad that states " Lay it up on it's side and knife edge into the next county " Them folks must have been standing on the county line !!!. I think it may need a taller fuse to give it more lift. Other than that this is the must fun I've ever had flying an RC plane.

Dale