[dimwit]

I have a 70''s Catalina with the fueltank shelf under the port lazarrete as well. My primary tank goes there. I store a spare, plastic gas tank in the cockpit, lashed up against the transom. It''s never in the way (no one ever needs that space for footroom), though it does bring weight up and to the rear. The trade-off in ventilation concerns is worth it to me, and I don''t consider it unsightly.