Sorry Hugues, I'm an ignorant noob, just assumed you had to...if you moved it! LMAO
and Dave, I did exactly the same replicated the positions on the template, but the extra height threw it the first time, even though I tried to land the base of the white projection on the second ring as recommended. I take it, all the scanner does when it calibrates is align the rotational axis wrt to the reference template, and modify it's built in 3D model. Plus free scan is the way to go, after having a go, but just need to work out the alignment references...those matt balls look like a good idea, now i've seen those purple alignment marks in the software.
Alfred, it's a shame you can't tab or resize the three viewing boxes to make it easier to rotate/zoom etc. I kept trying to hold down the mouse and resize them, but a tab option to bring a window full screen whilst you found the alignment point would be useful. Just a 2¢ suggestion I'm liking the scans.