Has anybody else had trouble with the collar not forming all the way with sickle hooks in a do it mold? I'm trying to pour 1/4 round heads with barb and consistently have trouble with the barb or collar not pouring completely but my hilt mold comes out perfect all the time. I have a assorted size hilt mold so I guess I need to get some different size hooks because pouring 1 at a time gets old. Thanks for your help.