I started by comparing the purchased gear axle weldments with the drawings to determine what holes were missing. The first hole missing is the 3/16 inch pilot hole for mounting to the gear leg. Instead of drilling all the way through I drilled a 1/8 inch hole through the front side of each weldment only. This way I will be able to use the 1/8" hole to mark the pilot that I will drill through the gear leg. When I mount to the gear leg I will up drill to 1/4 and then make sure everything is aligned before drill through the back side of the weldment.
Welcome to my builders log for Sonex S/N 767. It won't be as big as a real 767 but if you scale the speed I bet it will be almost as fast
Dave's Sonex Builders Log 