Model originally uploaded to Thingiverse at https://www.thingiverse.com/thing:5388431.
This is design was made specifically for the Tubular frame family. It's a frame that you can build at home for very little money - yet it is super stiff and flies aweseom!
If you're unfamiliar, here are links to the 2 already released frames: 6inch: https://www.thingiverse.com/thing:5368370 7inch: https://www.thingiverse.com/thing:5365636
PS: if you plan on building one or would like to get more info, there is a Discord server dedicated to this type of frame. You'll get all the support you need there.
I designed a vertical mount for the Caddx Vista Air Unit, which includes an antenna mount. I have added the Fusion360-file. The design is parameterized, so you can easily adjust it to your Tubular-Frame in just a few seconds (ask if you need help, maybe i'll make a video about it some time). There is a parameter for rods diameter, antenna tube diameter and the width of the antenna mounting orb (needed if you increase the antenna tube diameter further).
The mount gets pushed in between the rods and is help perfectly in place. I doubt it will ever come off without you manually doing so. It weights just 6.3g.