My drain plug is a little loose so I removed it. West system epoxy on the holes and going to spin and re drill. And 5200 in place. My question is. Is the original drain plug brass or bronze ? I went to west marine and they only had brass I'm asking because I want to know if I should re use old one ore use the west marine one. Also. When I removed drain it had stainless screws is that a problem with dissimilar metals ? Will I have an issue with that? Thanks