It was interesting to watch and see the work that went in to it. One question they didn't address was why they bothered. The amount of work required was incredibly high and in my (admitted limited) understanding, 20's Steinway's aren't that hard to come by. I wonder if it was just for the challenge?
I am doing something similar with a Chickering baby grand from the 30's. I'm doing it for three reasons.
1. I want to learn about how pianos function. I'm a gearhead/tinkerer/etc and just find it fascinating.
2. I hate to see beautiful instruments sent to a landfill when it is possible to salvage them.
3. I enjoy it. It's a relaxing hobby for my spare time.
I'll learn on this one and maybe the next one will be a scruffy Steinway....or not.