I'm not sure if these will be big enough. It's become dark outside, so I'll have to get photos tomorrow if these don't work. I tried to crop them in their original size. The nock is flared, and two sides of the blunt end have flat spots on them. I painted the flat areas red. I've seen several Lakota arrows that had the sides flattened. They could even be flattened on four sides to make a square end.
I usually use wing feathers, but I haven't had any problems with the tails. My subconscience may have kicked in and told me to save the wings for pointed arrows. I hadn't thought about it!?! CC