waterproofing

What seems to be the best/preferred method to help with making the NOX 800 more durable in the water? Having read about some that have had issues has anyone made theirs more watertight?

So I noticed this comes up around here every once in a while. Also, I posted in another thread about one I saw years ago using a pelican box. I decided to put my money where my mouth is and make one. First I took an old BH VLF machine I bought in 2005 and used for many of my first years MD'ing...