I just ran some rolls of kodak 5296 through dip and dunk C41 with the d&d the remjet backing stayed intact and no problems were noticed on the plots-the remjet backing is easily removed with a soak in warm water and a pec pad. The resulting RA4 prints were very low contrast although printing with increased ND on the filter pack yielded some pleasing muted prints-very retro looking-some loss of contrast could be due to the age of the film which is now discontinued-I'll try this again with some fresh short ends-and will make up the some of the above mentioned developer-I also heard mention of using E6 bleach as a substitute as well-which may increase the dmin-and increase contrast a bit.