Decided to try and modify the F-623 aft attach strap to give more room for error/better edge distance where the strap meets the bulkhead. Used the same design for the inboard part of the strap and added a circular area to ensure edge distance. Made up a paper version and test fit that in the space. After a little trial and error, I had a workable design and cleco'd it into the F-623 for a test and to see exactly where the holes will fall. Alll looked good, so I started to make one in metal.