Your glider and mine are pretty similar in age. I wonder if the drip
problem is something that strikes LS8s with the 5.5 liter tail tank
over a certain age. I think the LS6 used a similar tank - any LS6
owners experiencing something similar?

Is there anything that would be destroyed by putting a CLR solution in
the tank and letting it soak? By your and others descriptions my
guess is that there are water deposit/oxidation buildups preventing
the valve from being able to completely seat, which could be dissolved
with a CLR treatment. Among other materialsn it's list of materials
it's rated safe to use on is fiberglass, and there are even directions
for using it in coffee makers so it's not terribly caustic although it
is very effective at dissolving the stuff it was designed for -Calcium/
Lime/Rust.

-Paul