I built a freestanding bookcase out of scaffolding boards and scaffold tubes this week, first time doing anything with woodwork since high school and it's been

I built a freestanding bookcase out of scaffolding boards and scaffold tubes this week, first time doing anything with woodwork since high school and it's been immensely rewarding. It's particularly hard to work in the real world where there is no undo button or source control. Ordering replacement parts takes a couple of days so all my screw ups have consequences beyond wasting my time. The end result is a bit wobbly due to some design defects/inaccuracies in drilling, so now I need to figure out how to adapt it. Overall it's saved me about £500 over getting a real carpenter to build me something, and I'd say I've spent about a day on it total, so I'm probably breaking even overall.