Didn't work on it today, but wanted to relate what I found out about fixing fuel tank leaks.

You want to apply a slight vacuum to the tank for two approaches you can take (keep it slight!):

1. Apply Loctite 290 Self-Wicking thread lock and that usually fixes most leaks.
2. Apply MEK, which cleans out the leak and then thinned ProSeal (or even better the less viscous variety I've mentioned before).

At over $20 for a bottle of the Loctite, I think I'll just go for Method 2 since that should always work.  Hoping to try this tomorrow or Wednesday if I do the wiring tomorrow.