DE Stubby weighs 564 lbs empty, no fuel, but otherwise ready to fly. Please understand that it is heavy as compared to the prototype. It has a larger engine with accessories, carb heat, cabin heat, electric start, alternator, oil cooler, and has a well supplied panel, brakes, radio, etc. There have been several discussions on this group about the DE weights, with some examples, I believe, weighting a bit more.