Ok, I used the last of my Fusor. I swished the interior with denatured and drained it twice, then used a heat gun to dry the hell out of it on the inside and outside, then shot the Fusor down into that area while that corner of the tank was pointed down. Then quickly I heated the interior and exterior in that area hoping to make it flow better then swung the tank like a crazy man hoping centrifugal force would help, then put the cap on and plugged one hole and blew in the other as hard as I could... all in the course of a minute and a half or so which is the working time of the Fusor. I feel like a nut. I can’t even see if the stuff went down into the right place to fix it. I’ll let it sit for the rest if the day even though it hardens enough to sand in 10 minutes.