Clueless as to why I never posted the fitting pictures and leak seal solution to my original mod thread, but here it is..
I used a scrap of 25 year life pond liner, and some aluminum mesh..
Here is what I did.
Cleaned the roof...
Sealed the pipe to roof with Tempro 635.
Placed the square of pond liner over the pipe..
Made sure the hole in the liner was smaller than pipe so it was stretched tight forming a physical seal... you can see what I mean...
Then I formed a bead of 635 over it...
Missed a pic of that, but then I had a little brainstorm moment..
I cut another ring of pondliner about maybe 3/4" wide... tight fit around pipe again and slid that over the pipe above the primary seal..
My logic was that even if the pipe to roof seal cracks this little lip will shed water around the pipe, so it never gets close to the joint.
I then put the aluminum vent back on, used an Awl to find and punch the screw holes, and put a few in place, and cut off the excess liner with a utility knife.
Removed the vent again and put Tempro 635 under the liner, and under the vent and screwed that baby down!
After that, I ran a small bead of 635 around the vent..
Final view of the whole thing.