Responding to both questions:

@Michael R 1974: I used ascorbic acid instead of isoascorbate because ascorbic acid is easy to obtain. You can even buy it at health food stores, whereas isoascorbate was not even sold by Photo Formulary the last time I checked.

@yeknom02: Here's the link to the long DS-10 thread:
This is basically all my questions, answers and discussion about developers and my unexpected experiences with them as I was learning about the topic. Home-brewing developers is full of surprises. Several knowledgeable people contributed much good information in that thread, so it's worth reading.

Mark Overton