This is a device that lets you mount an FPV monitor onto a Taranis Q X7. It requires 4x 8-ish mm M3 bolts (though you could get away with 2x) which clamp the mount onto the radio handle.
I printed mine with support on build plate only for the main piece, oriented with the rail pointing up, like the 2nd/3rd picture (I think the stl orients upside down by default when loaded into a slicer). The left and right clamps probably don't need support, though it may help keep the clamping face cleaner.
I included the SolidWorks and Step files; it's a multibody part because I modeled it all in one piece then split the 2 clamping pieces off. Feel free to modify it, upload different versions, etc
I originally uploaded this design to Thingiverse May 2020
The author hasn't provided the model origin yet.