When I traded, my JK, the mount went with it. Dealer asked what it was, I just said a CB antenna mount.
That Double panel is a pain in the ass, it took A LOT of work getting it to crush the two panels together so the mount was secure. In face I had to take 4 new bolts that were about an inch longer than the ones from Breedlove so I could tighten it down enough so the connection to the coax would be clear. Once the body panels were crushed, I took the longer bolts out and replaced them with the stock ones for a clean look.
I would not mount an antenna there again. By the time it crushed the two panels together enough for the mount to work, it sucked in the outer body panel distorting the panel. It looked terrible if you knew what you were looking for.
As for the performance of the mount, I would buy that mount ALL DAY LONG again, IT WORKED.
I traded my JK so I forget if the passenger side panel is a single or dual metal? If you do not off road, consider mounting it on the passenger side panel.
If you mount it in the same spot I did, be prepared for a few hour install, a lot of cutting, a lot of muscle to tighten it down and a distorted body panel. The longer bolts I used to crush the panels together should be heavy grade so you do not snap them while tightening them down. I could have used an impact gun, I just did not want to break one so i took my time.
Now if Breedlove could make an extra aluminum insert so the panels do not have to be crushed together, it would work great, but he would also have to redesign the inside coax connection so it can make the extra reach of a new spacer. I'm sure he can do it, but there is added machining so added time and $$$$$.
I bought a used TJ because I missed my Jeep, the tail light mount is the best idea for the TJ, that is what I will be installing.