Ive had better luck using the wing mounts than the tail or fuselage jack points (IV-P).

It appears that heat from the exhaust distorts the picture slightly if the camera is mounted under the fuselage. Much better results under the wing.
I’ve seen a mount made of fiberglass that fits like a shoe on the front of the vertical stabilizer, but have not had a chance to try this.

Several people have successfully fastened the GoPro camera to the outside of the fuselage with double sided tape, but I wasn’t willing to risk losing my camera or whacking someone, so I’ve used a mechanical fastening so far, to include putting a screw through the base of the GoPro to attach it to the aluminum plate that I bolt to the tie-down.

Bob