What???? my kitfox 3 with E81 mod was special built cowl...as to CG its 11.26 with 10.2 max forward and 14.28 max aft at 1050 # with 2 people 178# each plus 7 gallons fuel......flight time 250 hours on aircraft now...have no problem take-off or landing within 250 ft...1992 Rotax was unreliable hence the E81