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Duckbill Bailer With Push In Plug| Tenob | Boating Gear | DFSupplies

Duck Bill Self-Draining Plug - Boat New Zealand - FREE FREIGHT!* on orders over $50.

And I'm creating one.... :)

Duck tape is a magical product.

2 bungs.

Agreed but only if you put it in before welding is finished.
Bit of devil's advocate here, as I wouldn't put it in a good sealed/chambered pontoon either.

You may wish to say why you don't want to ( sweating, corrosion, weight up top due to water, etc...) :)

What about that 2 pack closed cell poly urethane expanding stuff ?

Could you do a 6m model? :)