Hi Brian,

> One peculiarity is that the Base pt / End pt line appears on
> the screen, until Done or Cancel are selected. ?????

Some geometry factories add additional decorative geometry to the geometry database which for the regular commands help to kind of illustrate what is happening. If you run the regular Transform > Mirror command you'll see that when you go to pick the 2 points for the axis line, there is a line drawn between the points basically marking the mirror axis, but that line goes away when the mirror command is finished - that line is the "UI geometry" that the mirror factory is creating.

You can disable the creation of UI geometry by calling the disableUIGeometry() method on a factory, so try doing something like adding this line:

factoryMirror.disableUIGeometry();

immediately after you create the mirror factory.

- Michael