I just ordered the Spirit Short Wheelbase PDF and plan to build one. Right now I am scratching my head and looking for donor bikes. I am also trying to figure out what size front wheel to use. 26 for the rear and 24 for the front? The PDF file has a ton of information and sadly seems to be missing some as well.

Have also been thinking about buying a welding set up but maybe instead I'll look for someone who does work on the side to weld it for me. I am probably going to build two. One for the misses and myself.