Here''s what I did:
1. Remove rubber washer from base of Mini antenna.
2. Apply blue Loctite to adapter stud.
3. Screw adapter stud into antenna with small flat-head screwdriver and let Loctite dry.
4. Leave rubber washer out and install antenna.
The rubber washer is only there to provide tension on the factory Mini Mount. If you do what I did, here's the result:
Please forgive the photo quality, as it's cold, dark, and rainy here and I did the best that I could do with the on-camera flash.