That the setup that I had originally, but I've never been a fan of Garmin's attachment approach, doesn't feel very secure to me having a $200 device held in place by two rubber bands.

My seat post is up higher, so I was able to approach this by installing a Wolf Tooth B-RAD 3 slot mounting system with addition of a K-Edge Garmin mount.







On another note, how are you guys installing a single bottle cage. My Canyon Tri Bottle holder didn't come with any instructions and I haven't been able to find anything online. Initially I installed the angled bracket with a bottle cage, but the bottle wasn't completely sittitng in the cage, so I removed the angled bracket and installed the bottle cage straight.