I have the Schwalberg article in question. E-mail me off-list and I will scan it and OCR it for you. I won't publish it on the web, since it is copyrighted material. Much of what I learned from it is reflected in my own article Appreciating Rodinal. There is a note at the end of my article that gives one reader's comments on mixing Rodinal and Xtol.(posted 8194 days ago)