Hi Henry, thanks . . . I was sure that would do it . . made the CS change you suggested, but . . no joy.
Here's a couple of screenshots. "good selection" shows just the one part selected, and that's fine. But when I add the other two parts shown in "bad selection", this is what I get. No matter where I set the workplane, same result. The CS reverts to the 90Â° orientation. It's a real PITA. I also attached the drawing. Could this be a bad 17.2 patch ?
Oh, one other thing. If I select any bunch of parts, the drafting palette shows the correct extents cs, oriented normal to the assembly.