Apple //c Monitor Stand Knob Parts

This is the tension knob and friction bushing for the Apple //c Monitor Stand.  You can see them compared to the 1980s original parts in the photos.   You'll need to install a ¼-20 heat insert into the knob.  These worked perfectly for me with just some minor sanding.   

I printed them in White Overture PLA.  See the GCode file for how I printed it.  I bet the color will match OK after I de-oxidize the Apple plastic parts.

FreeCAD files attached for anyone that wants them.