I mounted the motor mount yesterday. I first extended the center mark on the fire wall and line up the template to mark the center of the bolt holes. I drilled the motor mount holes and after I finished I realized something. There was a key hole shaped piece of plywood supplied in the bag with all the landing gear hardware (see pic.). That piece so happen to fit right into the fire wall cut out (see pic.). If you tack glued it on to the fire wall and use a screw to hold the motor mount template through the center. This would work quite well and allows one to drill for the motor mount perfectly. Mine turned out o.k. but if I had to do it again…