I did build a tandem based on Sheldon’s website. Never used it in anger on the road just cycle paths, used to have two kids on the back and a third following on their own bike. Because of the age differences between the kids it was one activity we could enjoy together on the local cycle paths.

It’s amazing what a difference just a little generosity of knowledge can make in other peoples lives.

Similar story here. Sheldon’s site took the mystery out of wheel building, at least for my basic needs. I was motivated by acquiring a couple of ancient Sturmey Archer hubs and wanting to put them on modern rims. Those wheels have been bulletproof.