I have seen on ebay powder adjustment knobs. Some look pretty fancy in that they appear to be made of brass and have readings inscribed on them. Others appear to be plastic knobs. Well......the other day while chasing down some small parts for a home project at Home Depot, I stumbled across a bin marked as nut protectors. Looking inside I discovered some that are a press on fit that will provide finger adjustents on the 5/15th's bolt on the Dillon. 80 cents each.