I waterproofed a Sovereign Elite a couple of years ago, it works fine. Used a pelican case box, and took the whole works in to an electrical supply house. I waited til all the work crews were taken care of before bothering the guy at the counter. He was real interested in what I was trying to do, knew what I needed for waterproof connectors, etc. We talked about the best way to mount the connectors, etc, and Ive never had a bit of trouble. HH
By the way, that saved me over $500.00 by doing the Sov, versus laying out a grand for an Excal, (which I also own, and is my main detector).