A whole day's worth of work to drill 2 holes! It took quite a while to get everything aligned and positioned correctly but it was well worth the effort. Everything came out perfect. Plenty of edge distance,,,there is more than the 5/8" distance called out in the plans,,,whew,,,and the sweep and incidence came out perfect. I double checked both after the rear spars were drilled. What a relief! I drilled these holes undersized and then reamed them to the correct size.