This mount is for a for a Crosstour CT8500 action camera with two holes for 3mm screws 25mm apart in the base to attach to a HolyBro Kopis Cinewhoop frame.

It will probably fit a number of similar action cameras and frames.

Measurements:

BASE
35mm square
holes 3.2mm diameter 25mm apart

BODY (internal)
height 43mm
width 35mm
lens hole rectangular from top down 30mm

Notes

The body (P3) of the mount needs to be laid on its most complete side (starboard) in the slicer in preparation for printing. There are two components for the adjustable base. The one with the holes in the panel (P1) is to attach to the drone, the other (P2) is to be superglued to the bottom of the mount body. Please see the pictures for guidance.
I have included the Fusion 360 original file as well as the STL for anyone who wants to adjust it without having to start from the beginning.

K8200 heavily modified

Yes

No

Your favourite box printing setting (Line width 0.4mm)

Your favourite box printing setting (20%)

Lay the body of the object on its most complete side (starboard) in the slicer to prepare for printing.
Clean surfaces to be superglued with isopropyl alcohol.

Trim/Finish the components of the mount. The holes will probably need a drill bit put through them to clear them to 3.2mm.
Screw the body and base together with a suitable pair of 3mm bolts, washers and nuts.

Generic design drawn from scratch in Fusion 360.