With the scaffold clamped to the sheers we placed levels across the kayak, approximately at the location of the bulkheads. Then we adjusted the kayak within the scaffold until the levels and our eyes told us it was level and even.
Getting the kayak straight at both ends took some doing. From above it wasn't at all obvious where the kayak was out of true. This meant spending a lot of time lying on our backs underneath the kayak then crawling back up again and tweaking, then crawling down again for another look.
Getting the stern to come together properly was problematic. There was about a quarter inch gap between the sides and bottom at the stern. The copper wires weren't strong enough to pull them together on their own. The solution was to tie a tourniquet around the back of the kayak to pull everything together while it was stitched.
Then in a whirlwind session of mixing and applying epoxy, fiberglass and filler, we glued the interior of the vessel. We had neglected to buy the large sheets of fiberglass yet, so we were unable to finish the cockpit area. But we did manage to glue and tape all of the other seams, and insert the bulkheads.
Next time we need to catch up with the other kayak (seen below in its current state)...
