Well, it took me almost two weeks to put the left side chain together. By the way, I made a little jig to make the final assembly of the chain easier. I drilled two holes in a block of particle board, the distance between the rear axle and the drive sprocket. I put little rods in the holes so the drive sprocket and the rear sprocket/brake drum are the right distance appart for final chain makeup- big help.
On the right side chain I used my best strips to create the chain. I knew I would have a harder time on the left chain because the strips of links were not as great, and links kept failing. It was okay at first- I was fixing two breaks for every break that happened. But I got into the situation where one new break would happen for every link I repaired :-(
The kit does provide a few extra chain links, both of the outer and inner links. I was running out of links though. The outer links were so fragile- being made from 020 mil plastic, about a hundred mils wide and about three-eighths long, with a 050 mil hole in each end. I dispaired when I thought of having to make some links from scratch. I ended up with one spare, though maybe I should have replaced some of those outer links instead of repairing them. Anyway, I got the chain and rear wheel on.