Dear nighthawk,

This is just an idea, and maybe it's an awful idea, but have you considered gluing some of those foam cylinders that kids play with in the pool along the waterline of your canoe?

I was looking at them last night at BPS and they are about 4 inches in diameter. If you carefully cut about 1 or 1 1/2 inches off of them longitudinally and glued them just above the natural waterline of your loaded canoe you would essentially make your own sponsons.

Radisson/Meyers Sportspal canoes get rave reviews for the stability that their foam sponsons provide so maybe it would work?

Regards,
Avalon - Tim Murphy