A GoPro-compatible mount that attaches to the underside of the Sigma Short or Long Butler.
Analogous to the official version from Sigma (see here), however with no waiting involved.
I used this to mount my headlight along with its official GoPro mounting bracket.
Print the model on one of the diagonals (such that the M3 nut impressions stick out the top).
This ensures good printability and, most of all, good directional strength.
I can easily twist the Sigma Long Butler with this setup without any sign of failure.
The author marked this model as their own original creation.