After pondering the right side cowling flange spacing I had a semi sleepless night because I thought it would be okay to not have a fastener in the corner. The motor mount was in the way of perfect spacing as were the hinge pins. I was wrong. The engineer side of my brain said do it over and do it right and forgo the exact symmetry. So I removed all the right side flanges and redid the spacing so the corner had a fastener. So while the vertical portion of the cowling is not spaced, is very acceptable, misses the motor mount and allows for installation and removal of the side hinge pins. The horizontal row is spaced at about 3.50. I will use new flanges and drill through the existing holes on the right side of the cowl. The problem (in my head) solved. The left side hasn't been done yet, so it's just a remarking exercise.