I'm still planning my new system (as it's all dependent on my new house being built, which is taking forever...) but I do know that I'm planning to get a plasma screen (possibly a scaler too) and I want to get it ISF calibrated a few hundred hours after installation. I know that Piers and Gordon do ISF calibration and will travel, and Joe's offered to quote me for supply of a plasma and then ISF calibration. I suspect that some of the other people I'll be getting plasma quotes from will also offer it. I'm wondering whether it makes much difference who actually does the calibration, or whether I should go for the most convenient one. Are all ISF calibrators equal, or is it more art than science, so I should get a "craftsman"? Any opinions welcome, and recommendations or disrecommendations (by PM if you'd prefer not to comment on this in a public forum). Thanks guys.