Sorry for my English.
I have said that this film (Agfa CP1) are no longer manufactured and Agfa was reorganized ???
Agfa produce sound negative for cine?
If all the positive color could develop smoothly on the ECP.
Agfa said that if can develop a positive color (their) on a developer color negative ECN-2.
I do not understand why you do not want to try other brands color positive, relatively fresh in ECN-2 process.
Basically only Kodak produce positive color, and Fuji was stopped a few years ago the positive color.
In my opinion it could go.
Several years of seniority to a positive is not a big deal.
If you pass level for decades is certainly unpredictable outcome.
George