I tried printing off other designs on Thingiverse but none of them fit or locked like they should, so I decided to design my own. With this design you can hear the audible pop\click once you rotate the adapter into the Quadlock case.

As noted in the print setup the support settings are key to getting the tabs to print with the correct form while making it easier to remove the supports without damaging the adapter. I used a pair of needle nose pliers to pinch and remove the support material.

Please leave comments on how well the adapter does or doesn't fit and the printer you are using.