Thanks for the answers guys.
I still don't know where to buy them, how much would they cost, and what is the average fee for a professional calibration vs. this disks.
It would also help if users post the way they access the Service menu in various screens (maybe a sticky thread: Service Menu Access). Anyone know how to enter the service menu on the Xelos SL32? I know it's been asked before, but not answered yet. Maybe a PM to me from the IFS guys

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How many people calibrated their screen using the DIY route, what was the result, and how many of you opted for the pro. calibration. If you have taken pro. calibration after the DIY route, was it worth it? Did it make much difference?
I'm just trying to figure out what the best route is.
Anyone with prices and links?