Considering the Spyder2 is $149 at Amazon, and furthermore the Pantone (Gretag) Huey is only $79... the only point a Do It Yourself monitor colorimeter would be educational. However a DIY reflective spectro with XY table would be most welcome :) I'm sure the parts list would add up to less than $500, for a device that usually sells over $2500. And you could do a large aperture (and large table size) one for wide-format (billboard) printers, for which the only current solution is the Barbieri at over $8000 I believe. Probably it'd be slow, but the educational experience on that one would be really matched with real savings. A great project for a university! -- Roberto Michelena Infinitek Lima, Peru