MStudt
official vendor
I wonder if this bolt (Arrow) could be replaced with one a 1/4" shorter. Maybe I don't have it installed properly. I haven't played the radio for a couple weeks listening for any errant noises under there.
If you can find something that's 7/16 x 2-1/4" that should work. A 2" is a bit short, and the next size up for me is the 2-1/2" you have.

