Having run out of liquid soap I had to make some soapy water the night before for the prefelt stage.
Considering how sore I was after session 1 (recovered just fine by the next day, hooray for faster healing), this time I stopped immediately after inverting and removing the template. The inside is not properly pre-felted yet.
You can see how much less shrinking the second boot has gotten so far. You can also see that on the first boot I concentrated mostly on the foot and shortening the leg. The leg width needs a lot of work still.