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I thought I would knock some dust off my drafting skills after a small chat with @captain_aggravated@sh.itjust.works
Seeing this image on the tutorial made me realize, FreeCAD seems to be a Technical Geometry Super-Suite. It makes sense that CAD would grow to include all of these things. But I thought sharing the initial perspective of some one who hasn't looked at this stuff in about 18 years might be interesting.
Granted I'm not actually familiar with most of this stuff, and none of it from the POV of FreeCAD. If this can deliver 10% of what I'm looking at, I'm in for a treat.
I have found one issue with FreeCAD fillets: it doesn't like it if they touch, that is...draw a rectangle with thickness of 10mm, and then apply a fillet around the top and bottom surfaces of 5mm radius, which would produce a perfect 10mm diameter. It doesn't like doing that. 4.99 will work, but not 5.00. If you want a perfect half circle on the edge of something like that, you have to draw that another way.