Rebuilt A 833 front oil leak

Somewhere on FABO, I posted that the reverse switches always leak, even the new ones right thru the swedging and around the spades.
The only cure I have found is to take the switch out, clean it thoroughly outside and in, especially behind the ball, and blowing it out, multiple times. Then I use a two part epoxy that I smear all around the electrical spades, and jammed down alongside the spades, as best as I can; then repeat all around the perimeter swedging. Then, finally, heaping it part way up the spades, to increase it's grip.
Finally I hang it up, spades down and let it cure.

Silicone will not stay on there.
Nothing else that I have tried, sticks or stays.
Apparently other guys have had this trouble cuz I have two alloy cases on the bench right now, with the stripped threads in that location.