If my memory is correct.
C41 is different. I pushed it not by longer development but developed at a higher temperature
All the colour work I did was at the maker's recommended speed and times and temps. The one thing we wanted from colour darkrooms was consistency to a known standard. The most colour negative I dealt with was when I worked in engineering; out in commercial life it was almost exclusively transparency work. It made no sense to run my own colour line. The few times I had to offer prints were terrible experiences for me because, as I'd pretty much run the engineering company's colour department on my own, I knew that commercial labs worked to a thin margin, and would not go that extra colour filtration test beyond their budget, whatever that was.
I detested working with external suppliers of photographic services, but when it came to big prints, there was no alternative for me.