good question WSB
I too would like to hear what someone with more knowledge than me has to say abuot this.
Off the top of my head I would say just make sure the cover plate is sealed good where it bolts on and make sure the bolts have a good seal. Other than that I really don't know for sure.
"I would rather be exposed to the inconveniences attending too much liberty than to those attending too small a degree of it." - Thomas Jefferson