All day, I worked on the bulkheads. To do it right, I have made several template . Old kit did not have any holes so you have to drill out the lightning holes. The picture of the F612 end view does not show well what I wanted to show: flanges on the forward position are 8 degree open and facing the rear end, they have 8 degree inward. Also the end flanges are only 5 degree instead of 8. I also worked on few others bulkhead but had to stop because I was tired ...