I have a mod IV with a 912ul, speedster, taildragger with Grove gear. I expect to weigh 650 to 675 pounds when finished. At 1200 lbs max take off weight this will leave me 525 to 550lbs. With 2, 200lb adults and 27 gallons of gas I'd be overweight. Of course I'b be the only one to know but here's my questions. (1) As long as CG is inside limits, what does it matter? (2) Can a mod IV 1200 be registered with a max take off weight at more than 1200lbs? When I had my CGS Hawk registered and inspected, I set my max gross myself and no one questioned it. Thanks, James Thomas