This is a question to native English speakers.

What is the correct wording when talking about mirroring: is an object
- mirrored along a mirror plane
- mirrored across a plane
- mirrored with respect to a plane
- something else??

Any help would be appreciated!

What do you get, when you import the stl back to FreeCAD?

In this case: use the "Set colors" dialog with two box selections.

Oh, I thought that's what you wanted, make the whole thing grey.

freedman wrote: ↑Wed Apr 24, 2024 7:06 pm So, obviously there could be many vertex on a face but IMO it would be best to use one of the vertex as a default so sketch origin is in view.

Any thoughts on this?

Sorry, it is not clear to me what the point is here. Everything seems to work perfectly.

intufreecad wrote: ↑Wed Apr 24, 2024 5:55 pm What are the usecases of Freehand Bspline?

Your use case seems to be none of them. You may be better off with addon Parametric Curve FP.

I'm trying to use the fastner workbench to create a threaded rod where the thread is displayed. I'm using a custom diameter and pitch to get a 5/8x24 but no matter what I try I can't get threads to show in the model. I'm using version 21.2 on an Arm M2 Max Which threaded rod did you use? Your full ...

I wanted to try my proposal, but the solution seems easier than that: I selected bot objects and exported them together. They keep their relative position. I checked with re-importing into FreeCAD and with my slicer (Cura):

(See my reply to Bance, posted here twice by accident because the first attempt seemed to be unsuccessful) I deleted one of them. You could have done this yourself, as long as there was no reply. Both sketches do indeed have the same coordinate system, but one of the two original sketches was moved...

The workaround is to separate the circle and use a negative offset; but it's of course only a workaround.