Hi Justin - that same thing (pick 2 points for distance) also works for fillet and chamfer by the way.

Re: Slider - I've had a couple of thoughts along this same line. I was thinking that once you have a distance (I guess I could default to 1.0 instead of no default, especially now that you can cancel and update parameters dynamically) I could put a couple of grips on the model, along some surface normal lines.

If you grabbed on one of those grips you could drag it and it would be another way of tweaking the distance - the current "distance between any 2 points" method would still work if you clicked somewhere not next to one of those grips.

But it is going to be a while before I'll be able to experiment with this.

- Michael