There are many many mods you can make on this plane that are found by searching however the two I have found to be most benefical are to use two nylon bolts to hold on the landing gear rather than the 3 steel provided in the kit as after awhile some rough landings will damage that piece of the fuse cracking it, etc.. Also, the rear wing part of the fuse cutout where the trailing edge of the wing sits is a weak point. A doubler on each side of the fuse running fore and aft of the trailing edge several inches on the insides of both fuse sides strengthens this area. Its a sweet flying plane and very responsive. Can be slowed way down for landing. I roiunded the wingtips on mine b/c I like that look. But she is no more due to pilot error!