I didn't like the screwed in PTFE coupler (a hassle to feed filament through) and wanted a quick swap feature. So I remade the upper part of the adapter plate in F360 based on the measurements of the old design and mashed the magnetic PTFE coupler on there. 

The original bottom part still has to be printed from the original model, the mounting with the M3x12 mm screw didn't change as I quite liked it. The magnets are press-fit 5x5 mm and can be extracted by pushing from the bottom again when disassembling it. No innie/outie version because the fit with the standard one is sufficient. 

Note:

I did a few iterations, and after the last one, I don't want to print any new test models anymore. Please print the original adapter plate, but cut it in the slicer and take off the top 3-4 millimeters. Otherwise, my chamfer wouldn't work. If you print the original bottom plate, you'll have to cut off a bit of the top parts. This would have been easier with source files provided but there we go. Maybe you'll find some use for the model, I quite like it but I also see it as an edge case for few people, so I'll still put it up as someone will find it useful. Prepare for a bit of cutting, though.