AKG K7XX headphone holder

I design this for my modular monitor attachment but I figure some people will find it useful.
Pic is slightly different since design has change slightly to match with the table/wall mounting.

The headphone holder can rotate to accommodate resting position of the headset.

I have include multiple types of mounting for different use cases.
dac holder should be print upright with the round shape on bottom

headphone holder is for AKG K7XX, K712 pro or similar
dac holder is for CEntrance DACport Slim or DACport HD.

Require:
4x M4 8mm bolt
4x M4 nuts
1x M4 30mm-35mm bolt (depends on the mounting type) or 2x 15mm or shorter M4