The two on the left are patterned after shield cut feathers and the two on the right are a simplified triangle pattern.
What I have learned so far.
1. The straighter the base edge the better, but since the leather is compressible and flexible some waviness could be tolerated.
2. This was a lot easier than I thought it was going to be. I just cut them out and used the standard fletching jig and CyA glue. Worked like a charm.
3. The FOC (forward of center) is 12% for the triangle fletched and 15% for the other ones, so that looks good. Not something I usually check but figured for something so different I should.
Haven't had a chance to shoot them yet. Hopefully I can get to the range on Friday. I'll give a report then.
Oh yeah the red and black bolt underneath is from a set I made for my wife to try. Just something quick I made to get her to the range.