With the canopy brace fitted into position, I was ready to drill the holes for the AN3 bolts. I first drilled the holes to #19, and then reamed them to 3/16"
After the holes were drilled. I began marking the lower portion of the tab so I can remove the excess material. The blue line represents approximately 3/8" edge distance while the adjacent (first) red line is the edge of the 3/4" angle, the red line on the far right is just an extra amount of material for good measure. That is my trim line.