Today I test fit the engine mount. I started by leveling the fuselage front to back and left to right.The only measurement that was off is the distance from the bottom forward fuselage to the forward lower pin. I am off by 3/8 inch. Sonex wants me to cut the mount attachment plates to achieve the 22 13/16 inch measurement to avoid a weighjt and balance problem. The bottom plates are plenty large enough to trim and get the correct fit.