Thanks a lot, Mark. To be honest, the "Progress on XTOL-concentrate"-thread makes me dizzy and I appreciate your simple PC-Sulfite formula.
I like simple formulas for a one-shot devloper that I can mix myself. P, C, and S are easily available, many other agents aren't like metaborate and borax or TEA, that are very resticted to buy for private persons where I live. BTW, I have the same P as you with CAS-# 92-43-3. I will try your PCS recipe, if I shouldn't be satisfied I still have my Caffenols I will report.
Thanks a lot everybody here at Apug. Best - Reinhold