Well having tried various unofficial formulations of C-41, most coming up with thin negatives, I tried the "C-27" formula presented here. I don't have a color densitometer or anything, but the negatives came out looking awesome, and they scanned nicely. I have not done any darkroom prints of them yet. But this seems to be a really good formula and delivers negatives of good density at the film's full rated speed. I am excited to see how darkroom prints come out.