So the GoPro mount turned out to be a better success than I thought.
The problem was trying to convince people to do their regular kendo and not worry about damaging the camera. It’s a GoPro ppl!!!
Some understood and would have happily tsuki-ed me all night long until I had to motion to yamae (I’m talking about you, Simeon and Okura sensei) but others were very timid and ended up just tapping the camera with the tip of the shinai.