Seems like a big deal about redoing the gas tank- would it not be better/cheaper/lighter to get a aftermarket fuel cell? and take out the old one? and have that fuel issue fixed permanently?

example-
RCI Fuel Cell - - | DriveWire.com
(probably better to source local)

are there any ones that mount under the trunk?

(still shopping for a series ii)

 

It's been done a few times over the years. At least one (no longer active) member here did so. Do an archive search for pics


Cheers
DD

 

see my post in fuel tank saga thread with Matt300zxt. I just put an aluminum fuel cell in my series 3.