I finally got around to weighing the boat today, sort of.
The easiest way for a home builder to weigh their creation is to stand on the bathroom scales, pick up the boat, then subtract their weight from the total. The trouble is, once I picked up the boat, I couldn't see the scales. I tried a few different holds and postures and sort of got a decent look at the scales, kind of. Even when I could see them, the boat was blocking the light, so it was a challenge.
I'd originally figured the end product would be somewhere under 15kg, going by the weight of the frame which I could see through back then, then adding the weight of the final ingredients. Going by today's effort, my kayak is somewhere between 17 and 20kg. It doesn't feel like 20kg, in fact having put lots of cartons of frozen chips into the freezer at work, it doesn't feel like over 12kg. I suspect I might have to re-weigh with Donna eyeballing the scales. The scales were the cheapest I could find too, which might explain why my body weight seems to vary depending on the weather.
Even if it's 20kg, it's still easy to put on the roof of the Subaru with one hand, which means it's either not 20kg, or I don't know my own strength.