> Very cool design. You're really going crazy here with pumps, paddles, who
> knows what else? Sure got me interested.

This is all the stuff I've been building that's kept me away from building boat #2 - a Guillemot.

> Love your one way valves. Very interesting w/ the draw also being the
> discharge. You could also make the return do the same, but more
> complicated.

That's actually the way the Beckson pumps are built. I stayed awake many nights trying to figure out a hollow pump shaft or some way to make the return the discharge stroke, or make it double action, but to no avail.

I think my next trick is to figure out a bulkhead-mounted footpump made from 6" SCH40 pvc for hands-free pumping.

> Thanks Shawn

Anytime--thanks for sharing all of your ideas! Shawn