The good news: I think I've got the saddle in about the right place. Much easier to keep my body in the right position so I can breathe. The biggest immediate pain issue is the handlebars, and they're too low. Not sure by how much yet, but I can experiment.

The bad news: The Pruitt book isn't available at the Madison Public Library, so I'll get myself a copy soon.

I'm still getting saddle sores, so I'm going to replace my saddle when I get my handlebars raised a bit. Having it in the right position makes it clear that it's too narrow for my sit bones, and the chafing is due to it being too pear shaped. The rubbing is in places where the saddle is the only thing that can rub. So I should fix that. Having it in the right position has also made it clear that I'm a lot stronger than I thought tho... I'm now able to comfortably use the biggest chainring on flat ground, and I can climb gentle hills on the second chainring. I can even do this when I'm carrying a 40lb load of groceries!