Okay, how about being able to split curves? In AutoCAD it's called "break" command with the "F" option. Which means after invoking 'break', it asks for the first pick point along any point on the curve, or it may be outside of it. The second pick point will be the extent of the part of the curve intended to be cut out. The option 'F' just meant that the second point is the same as the first pick point. In short, it splits the curve in two. Rhino has a straightforward break feature and it's called exactly what it does -- "split", in which you can split a curve in any number of divisions. If you look at the mousewire in the previous post, three curves that are supposed to form one smoothed curve were done separately. Obviously, this is not exactly an accurate way to do it. Am I making sense?