...who once said that there was no need to use the 500 over the 400?

: While the pump bodies are the very same size, the larger, 1.5" O.D.,
: inlet and outlet of the 500 gives it a greater pumping capacity than the
: 400 can do with its 1" O.D. fittings. Their website says the 500 will
: do 15 G.P.M., and the 400 will give you 10 G.P.M. The drawback to the 500
: is that the 1.5" hole has over twice the cross-section area as the
: 1", and it looks HUGE on the deck of a kayak. I've heard of that
: being disguised as the base of a compass, but I mount my compasses
: somewhat more forward than that so I can read the numbers without my
: glasses. Instead, I adapt the 1.5" outlet down to fit the 1"
: diameter deck-mounted nipple. I lose some flow, but it's still going to
: have a greater capacity than the 400, and around here the 500's are
: sometimes cheaper than a 400, depending on where you shop.

: That's an ordinary pair of plastic Keepers, with 'faceplates' of 1/8"
: sheet PVC screwed onto them. By making a fold on one side, I got them to
: be stiff enough. A tad bit more comfortable than the smallish originals.

: o you have a picture of the bungie system?

: Sorry no; but it's as simple as it sounds. I'll send you a photo after I get
: back from vacation.

: Pete