I was wondering about that Delrin "shoe" in the eye bolt. I figured it was mainly to help protect the barrel but didn't think about it also spreading out the load when applying pressure on the barrel. I don't have a lathe to make anything like that, though. But I was thinking that maybe a piece of PVC pipe might hold up fairly well in place of the Delrin.
Good idea on the multiple holes for the eye bolt, too. With the length of the jig it would kind of limit where it could be positioned on the barrel so having multiple locations for the eye bolt in the jig would definitely be a plus.
Thanks again, Ed. Much appreciate this info.