Someone commented about the form I use to build my pirogues. I use this form on all my 3 panel boats. I got the design from my neighbor over 45 years ago when I built my first pirogue. It's pretty simple......one board with the proper side flair angle and bottom width and two clamping uprights glued and screwed on. I cut out the bottom corners for clearance of the chines. Bottom width can be adjusted an inch or so by raising the clamp up the sides. I like a single form because it allows the wood sides to bend into a fair curve with no fussing around with several forms. If I want fuller front and rear sections, I just spring in a temporary spreader bar where needed. Is it as accurate as a strongback with several stations? Probably not, but with a little careful measuring and centering, it's plenty good enough for my use.