1100 model uses the heavy tail and brace tubes. The seat back is now at station #4,and is no longer a full width seatback, which allows for more leg room and short pull pins for the rear spar attach point . Wing has a lighter(smaller) bottom spar cap. RS-8 instead of RS-9. Fuselage is 2" narrower. Might be a few more differences that I have forgotten, but basically, the 1030 is the old original miniMAX airframe with streamline cowel, cockpit area and rear decking. The original airframe had a lot of 447s mounted to it and some 503s. I would have no worries about the airframe as long as it was built per plans. Larry |