@edisoncarter The slugs they gave me are still in the bag. Im afraid I chuckle at people who polish in a drill as I have a lathe and have polished 3" stainless steel shafts to mirror finish (lots of work even at 1500 rpm).
but I don't find that a mirror finish is necessarily good. I make my own slugs from 5 9's occ copper. I put a new matte finish with scotchbrite. I think that makes the best electrical connection...that said the other half of the connection is a mass produced fuse holder.
Jerry