Dagger Kayak Bung Drain Plug
This is modelled from a Dagger whitewater kayak (Model: Mamba).
I have not yet tested it, but hope to check it's fit in my 'Juice' in the next few days, will keep this updated.
Note that the bung I modelled this from has a flat rubber ring to create a seal with the kayak. Outer diameter 1 inch, inner diameter 5/8ths Inch (Eww, imperial). Approx 25mm OD, 16mm ID. Thickness is ~2mm.
The original is also made of a more rubberized material, so PLA or ABS may be too hard to get a good grip on the boat and seal water leaks, lets find out!