Hello Barry: I tried to send a message off the list in the original thread but was returned by the server. You must be happy with your resources. Perhaps we got to wait for a better color reference target as Klaus Karcher did, but a workflow where the capture device is a medium format DSLR is the best relationship between price and quality if you (I'm in the situation) haven't access to 4x5" or greater slide sheet or don't want work with it for time consumption in the timeout for developing and verification. Other thing is that you can afford a drum scanner. You can compare "a few dozen an hour" with the production of a large format camera of a few dozen (more) a day. I can capture one hundred 35mm color slides per hour, individualy focused and exposed and can go faster with monochrome and color negative strips. With bigger photographic materials is slower. But when capture pieces of art, framing, iluminate, focusing, shot color reference chart (ColorChecker SG and Kodak Q14) at the best aperture for the lens, verify the light condition and shot, twelve captures per hour is a good result. If the piece of art is fixed to the wall takes other timing. The question here is money. Are you going to capture for general purpose without compropise or a "definitive" capture. The two are the same if we consider conservation but you must do that with the best combination of harware, software and consumables you can buy. In this sense there are rich brother and poor brother. It seems like you have a external service to do the job, and I could suggest that a "well profiled" photographer can do all the job as institution staff member as curators, archivist, restorers,... that can work closely with designers, print service and others. In the actual configuration, leaving the maths to the software, am a custodian, photographer, editor and proof printer at a (little) institution, one-man band. If it serves, having in mind that is refered to photographic conservation and distributing photographic collections, take a look at http://fotoconservacion2011.org Salud Jose Bueno