Hello Graeme, Don't know if you remember, I asked some months ago about support in Argyll for the HCFR colorimeter, a french project designed to do video-projectors calibration (http://www.homecinema-fr.com/colorimetre). One problem was doing the hardware. There where a common order (about 400 people), and I ordered two colorimeters. I would like to send one (fully assembled) to you, as you where interested in such DIY project. Source code of the original french software (and driver for the hardware) is not yet public; developpers are waiting for the 1.0 release, which sould come soon. About the driver, a developper said to me that this is a simple serial-over-usb protocol, so very simple to implement. This colorimeter does not give absolute values; it has to be calibrated too! I don't know exactly how they do that, but I think it could be done using a real one, like DTP92/94. It could be interesting to find a way to do that without other instrument... Anyway, the aim of all this is to connect two projects pointing to the same direction: Argyll (free software), and HCFR (free hardware). I'm sure both projects could benefit from each other; sending to you a colorimeter is my contribution for all you guys are doing for the community. So, could you send me (in private) an address where I can post the colorimeter? I should receive it at the end of september, so you will receive it a few days laters. -- Frédéric http://www.gbiloba.org