I bought an O-320 LEZ 3 years ago and have made numerous mods to it. It is 985lbs empty, I weigh 220, and wife is 145. We fly out of Prescott AZ (KPRC), Elev: 4980, and even with full fuel I have no performance difficulties, even in hot summer months. I'm mainly concerned about stress on main gear struts at high gross weight landings.