My next try at these was more successful in that they didn't develop the toad skin. I believe this was due to draining the curds for almost 24 hours and then packing them into the forms instead of draining for only an hour or so.
I also cut down the amount of starter, which improved the taste. For two gallons of milk, I used a little under 1/8 tsp of MM100.
There is one thing I don't like about the cheese body. It was a little too "airy." P. Dixon says to drain at 68-72 deg F, and that the higher temps promote gas production. Mine were at least 72 deg most of the time and for several hours were 75+ because the oven was being used and it was hot outside.
I made these for the fourth time yesterday. Now that is has cooled down outside, I set my thermostat to 70 so the cheese should be exactly that temp the whole time. We'll see if that improves the consistency of the body.