Hi Burr,

> The sliding point would define a percentage of the angle
> at the placed point.

Not sure that would work, because that's would be some kind of linear step that would probably not provide for a smooth gradual start or end.

Something that does "ease-in/ease-out" probably needs to be based on more like some kind of cubic blend that would start with only a little bit of "angular velocity" at the ends, and do more near the middle.

- Michael