I haven't flown mine yet but I can tell you two things on this plane that I feel contribute to this problem. One is gear height as you mentioned. The plane needs a small amount of positive angle of attack. The nose wheel needs to be adjusted so the leading edge of the wing is slightly higher than the trailing edge when sitting on a level surface. A degree or two of positive AOA should be enough. The second problem is the stock location of the main gear. If your mains are in the stock location and your CG is around 10.3" from the leading edge of the wing at the fuse, the main wheels are over 5" behind the CG. This makes it tough to get the nose off the ground for a nice smooth takeoff. That's why you will find many flight reports of this plane wanting to jump into the air at a steep angle. I rebuilt my main gear blocks side to side instead of fore to aft and bend my own fixed gear from 3/16 music wire. My main gear is about 3" forward of the stock location, about 2 1/2" behind the CG. This should help the plane to takeoff at a nice shallow angle and also benefit the landings by making it easier to keep the nose up after the mains touch down. As far as your over heating problem, it sounds like it's leaning out for some reason. How is the fuel tank orientated and plumbed?