Why chop up a good canoe? Just sell it for a couple hundred (I sold my aluminum canoe for $250), and just buy a sailbox. I often have used ones that I sell for $150-250, and they are pretty nice (sometimes fiberglass, sometimes metal). I'm sure Rick has some sailboxes on his site here, or just go to a metal shop and have one built. Killing a canoe is going to be 1)expensive, 2)ugly, and 3)time consuming.