quick question for the OP though:

is this Rollei chemistry as archivally stable as the Kodak c-41 chems? Even with mixing the chemistry with distilled water, and doing the 1st wash with normal tap water to help establish the normal "mineral content" that is built(designed) into the process from the start, I'd be mixing all the other chems with distilled water, along with the final(2nd) wash step.

just wondering if there's any writings anywhere(maybe from Rollei) on this subject?