Rokform is having a sitewide 20% discount with "MARCH2021" code.

I put one on my motorcycle. Unobtrusive and discrete.

I did drill a hole in the center of it and filled it with a plastic epoxy however owing to an unfortunate incident with a previous one from them. The phone fell off on the freeway and was lost.

So, with the fill, it's VERY secure.

I see these advertised a lot on a couple YT channels I follow.
If I still had the Vulcan, I'd have ordered one for it.