I've trashed a novopen 6 already with a funky adapter breaking off. My 29g 1/2" tips don't work with the max adapter from Daropep, which is a really nice adapter other than that. But the max adapter I have the 3D file for is an older version that breaks off... I've broken a few off but have only been unable to retrieve the broken but and save the pen in one so far. I wish I had the 3D fole for the updated max adapter, but it sounds like yours might even be an improvement!! I'd love to try yours out if you could share it.