Denise, would you be interested in a spectrosensitometer? Bill? That is... if I theoretically had one to offer?
I really do think that such an instrument could be cobbled together with a little bit of effort. This might be a project that I'd be able to work on in the relatively near future (winter). I'm thinking about something made out of foam-core to begin with, but a prototype could lead to something made of wood.
It might not be perfect, but I think it might be more useful and easier to interpret than shots of color charts.
If there's any interest on that front, let's discuss it over here -> http://www.apug.org/forums/forum205/...sitometer.html