Zumo Bumper.

[Upt North]

It's a bit belt and braces but that's just me I spose....
It's a 3D printed bumper and tether for the XT. The tether fits nicely around the mount.....just in case.....I know!
It's from Weird3dprintsshop on Etsy, or some'at like that. It was a quick painless experience and the Sat Nav still fits in the Garmin case......just.
I replaced the tether with a Garmin item and it comes with the contact cover too.
Pics in case you're interested.
Upt.

[Barbel Mick]

I got similar but with the sun/rain shade.
Sorry about the beer but in a foreign country & it's the best I could get!!   

[Upt North]

Leffe Blond is acceptable.
Upt.

[purplebikeunicorn]

Good idea!

Had my TomTom tethered to my bike when it decided to try and part ways at 70mph on the M4 

Thankfully it did a bit of dangling before I could shove it behind the accessory bar and then pulled off at the next junction. Locktite and screws done back up real tight now!

[Barbel Mick]

@Upt North.........only just acceptable. 😉