Yes, I did remount the first one and took my time removing it. The adhesive still looked like hell. I had ordered some adhesive from eBay but as someone else mentioned, they were gray, not black. I finally found some black ones on eBay but they'd be shipped from China and would take a while. After my second Roav came in, I decided to use the mount from that one for my car and use the old one for my wife's car. That's when I discovered the spare mount.
I used the old one to temporarily position the Roav until I was happy with the location when looking from the outside of the car. I then used the spare mount when I was ready to make it permanent. Unfortunately, I didn't check the recording first and didn't notice that part of the mirror shows up in the corner of the video . So I remove that one and go to my final spare. Video looks good, outside the car looks good, wait, what's that sensor on the mirror that my Roav is now possibly blocking ? Google the sensor and I may be OK. What I should've done is just use the old mount temporarily for a day or two until I was happy then mount it permanently with a good mount.
I did find some 2" 3M double sided tape at Home Depot that's black. I'll use that in the future if I need to move the mounts again.