Just did this step today with a different, I think easier, method. Lay the side panel outside down on the floor. Glue stringer with thickened epoxy. Lay it on the panel marked positions. Put weights (full paint cans bricks,etc) on top of stringer to clamp. You need to use some heavy weights on the sides of the stringer to hold the bend; its a tighter bend then it looks. As always keep the cat out the mess. No screws or nails needed. By the way the plans call for 18'-6" of stringer, I only used just under 16 feet, maybe I will end up with a CS15. :wink: