This takes some elements from my hotbed strain relief and allows a GoPro or any suitably light camera to be clamped to the Y-axis lower aluminium plate, which can be found here The M8 locking bolt and Curved bolt plate clamp are the same parts as the heatbed strain relief. The GoPro mount part has a 6mm hole without a thread, I made a small bolt to fix into the GoPro circular mount but this needs tweaking as not a good fit (so I have not included this yet). A metal 1/4"-20 thread about 10mm long should work fine if you have one and I would coider a metal bolt a better option, hot shoe mount like the one below works perfectly here. I managed to print this vertically without a raft or brim and used 150 micro, fit time I have tried this layer height, which provided a good compromise between detail and speed. Just 2 outer shells and 35% infill. I would hone the M8 threads with a metal M8 nut or bolt if they feel a little too stiff, as they will break if over stressed.