You say:
If I tip inlines/carvers just a little I argue that they turn very little. There is no sidecut radius of a carver.
You are right, there is no side cut on carvers. And I cannot give you a technical explanation of why they turn, when they are tipped. But if you can't tell from the videos that they turn by tipping. You will just have to try them. You will find, that what they do react to, is tipping. In fact, if I pull my free foot up too quickly during the turn, to tighten the radius, I cannot keep up with them. They are heading back up the hill, while the rest of me is still going down the hill, and the pavement hurts. They react very much like skis to carving movements. They are not forgiving, because they don't drift, and there is no tail or tip, so the fore and aft balance range is narrower. Consequently they teach good habits. I don't have the courage to go very fast on them, so I stick to a moderate slopes, and make sure the rocks are off the road and any cracks in the pavement are small.
You can go to Jay Peterson's Site SkierSynergy (He is one of the Harb Ski System Coaches) and see more Harb Carver Videos Here: http://www.skiersynergy.com/cms/home-sk ... rving.html
You will have to register to sign in, but it is free. They are under the SynergyTube videos.
Kirt