What types of non-permanent GoPro mounts exist for the ceiling of a Cessna 172?
I do tests on truck aerodynamics, and occasionally we put tufts on the vehicles. We then film these tufts to see how the flow behaves. We also use these RAM mounts, but sometimes one of them would come undone due to unproper mounting, dirt or flexing of the surface.

We solved this issue by adding redundancy in the form of the Rollei 3x Suction Cup Kit:


Disclaimer: Not affiliated to Rollei, this is just the first one we found.