Vent Chamber location, 3rd Gen?

[hop along]

UPdate:
Saturday afternoon was spent trying to peel away the liner off the vent chamber.
Due to the Valk splash gaurd on the filler hole, the top is not directly accessible.  Easily fixed, however, with a dremel tool.  I elected to go for that vent hole second.
I did get to the bottom vent hole after some trial and error of bending cheap dental picks, courtesy of Harbor Freight.  However I really did myself in... I can push the pick into the hole as far as it fits, but I seem to also be just pushing the liner, which also seems to be IN the vent chamber.
Boy does that suck (or not suck, depending on which way the pun turns...)

I'm not convinced chemically stripping the liner out will do the job.  Because the liner will still be IN the chamber (I understand the stripper releases the liner, as opposed to dissolving the liner).

So.. options are, I suppose:
-strip the liner and reline, with a hope and a prayer
-keep my current drilled hole at the top of the fuel filler neck (not preferable for several reasons)
-vent the gas cap
-???

Hop Along