OK, so I guess this means if I hit on a combo of profiles that works, just keep using it. All one can do is play back and forth between V2 and V4 and see which set provides the most reliable screen to print matching in my working environment. Raises an interesting issue with respect to scanner profiles! Given that scanning film has become kind of a niche, one wonders to what extent scanner profiling is V4 aware, or if they are all on V2, and if one is using v2 for the scanner but V4 for the display and the printer, could one be getting disconnects because of this inconsistency?