Well I did this a little over a week ago and no fogging yet and it's rained quite a bit since then. Just a warning to people who are going to do this in the future: make sure you keep the clear housing in a clean place with little dust. I got some in there and it isn't fun taking the whole thing apart again. Also, for some reason on one light the screw holding the lens on was stripped badly; I was only able to get it out and in again once so there is still dust in one light but it isn't too bad. The link in my sig has some simple pictures for comparison.