I put something like this on our Tin Pickle; it replaced a rather ugly broken plastic POS filler door. I did need to fit an additional external vent since the original door incorporated a (small) vent.
I used almost identical ones on both my '48 and '49 Boles Aeros. Also used a very similar one for the electrical access on my '48. Makes a waterproof seal. Almost flush with the surface so it does not get hung up in the brush on the back roads.
We also thought it was a great idea in our 1960 tradewind to cover up an ugly hole where the previous water filler had been!
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Love. You can learn all the math in the 'verse... but you take a boat in the air that you don't love... she'll shake you off just as sure as the turn of the worlds.
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