Hi Burr, yeah I was just kind of making another example for Kevin there on how "points on the curve" can lead to problems when there are many of them being constrained at the same time.

Do you still have some more questions about the curve on point editing stuff though?

One other thing that I should mention - if you want to reduce the area of effect of the movement, another way you can do that aside from a full curve rebuild is to use Edit > Add pt to add in some more control points just in that one particular area of the curve.

So those are a couple of ways you can make the editing more localized to a smaller region of the curve. The part that is kind of harder is trying to increase the area of effect - that's what could possibly be done in the future with a multi-pass mechanism that tried to reduce changes in tangency like I was kind of mentioning earlier. It will probably take a fair amount of experimentation to get something like that to work well though.

- Michael