Ok, stuff on order. Hal, thanks
very much for personally checking those parts out for me. Very much appreciated. I hope I can return the favour some day.
Hal, Sway, on the advice of Ken, over at Hamilton Marine, who was also very helpful, I went with the less-expensive (ok, "cheaper"

) clamps. He was quite emphatic that the more-than-twice-as-expensive clamps were over-kill in this application. He assured me the less expensive hose clamps are all SS, just not as thick as their more expensive counterparts.
Ordered at least a foot more hose than I expect I'll need. Ordered an extra of each of the fittings I'll need. Should end up with four spare hose clamps. All this over-ordering will ensure that: 1. The project will go smoothly and 2. I'll never need any of the spare parts

.
I'll let y'all know how it goes
Jim