This is single handle arm for the Zhiyun Crane V2 (may work with others, don't know).
It requires a handle, I used the handle for the dual handle.
Can be used with the handle in any position, I prefer it pointing up.
Requires a small bolt and nut. I used M4.
First version, probably needs some tweaks - I'd like to increase the bolt and nut tabs and maybe allow for a gopro style bolt turny thing.
I printed in PETG (for strength), with supports from base and 50% infill (again, for strength). YMMV
The author hasn't provided the model origin yet.