Hi Michael,
Yes, that’s exactly right.
I run the Circles Tan function, click on the three points of tangency on the edges, and the script prompts me for the Z-coordinate. In fact, it automatically handles, in the background, the creation of the circle, the creation of the circle’s center point, and the deletion of the circle, and simply prompts me to enter the Z-coordinate. The point is created in the right place at the correct Z-coordinate.

I no longer need to manually use `BoundingBoxCenter`, delete the circle, select the point and manually use `EditCenterPoint` to choose the Z-coordinate.

But perhaps it’s not quite as simple as that!