I just processed C-41 for the first time using a Tetenal kit in a Jobo CPE. I had two rolls of 120 Porta 160 in there that look pretty good with a normal orange base.

I also had a 10-year old roll of 35mm Fuji 1600 in there that was almost certainly not stored well before it was given to me. That roll came out with a really brown base although I can see images there. The Tetenal instructions suggest that it needs to be re-blixed but I wonder if this could just be something to do with the age and ISO of the film? The other rolls came out fine so obviously I did something right.

The film is still drying right now so I'm not able to evaluate how it scans.