Hi Michael,

Thanks... I was thinking that Fillet is doing the same operations
bundled together behind the scenes ( more or less ) ;-)

The square wasn't a good example.
The 2nd situation that I mentioned is actually where I use trim and blend.
to fix the curvature of a line.
Some of the designs that I do have snaky flowing curves... I find it easier
to trim out sections that don't look quite right and use blend to make
a nice transitional curve, rather than editing the curve by moving control points around.
I trust "tangency" and "curvature" to draw a more aesthetically pleasing curve
than I can manage by hand.;-)

Jesse