Also had some problems with my
float switch installed just like yours. Tends to leak a little on the outside. I think it has a lot to do with the fact that the tub is ROUND, and the bolts (expecting to be on a flat surface) can't be tightened enough.
If you DO experience the same thing...maybe move it down a bit. See where the brute can has that flat part, where the handle is? miight get a tighter seal there!!!
In the mean time, might wanna put a bucket under the float just in case it leaks a bit!
Other than that...GREAT JOB! Looks good!