Universal Adapter Loose

Is there a way to tighten this adapter? I’m using it to draw, and it’s fitted quite loosely.

Here’s a video to show:

If not, I could 3D print my own, do you have any guidelines / suggestions for how to do that in terms of attachment methods?

looks like the central screw at the servo axis is loose, can you retighten it?

Ah yes, that definitely helped, thanks!