I have line pressure set to about 25% and delay at max. It cleared up most of the "clunk." But I still have a clunk when it downshifts into 1st gear... what should I do about that? Decrease the pressure more?

Once I get it set... where should I mount this thing? I currently have it zip tied up onto the body by that hook that's near the tranny. The pots are facing down, with the rubber stoppers in them. Should I move the whole unit, flip it over (so the pots are against the body of the car, or possibly encase it in a plastic bag?

There is the potential, however slight, that it could become submerged at some brief points in my adventures, could this cause a problem?