NAB to trident adapter for reel to reels
thingiverse
this is the simplest working 3D printable NAB adapter. Its a two parter so you do neet some form of glue. The hex hole is a close enough fit that once you put it together is does actually hold pretty well, but there is just enough clearance that I wouldnt rely on that solely. you can with this very simple plasticky thingy now play NAB reels without expensive NAB to trident adapters. That said this might not work for each and every machine.
Download Model from thingiverse
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