Cloudray K40 Laser Head Mount

I bought a Cloudray head mount to replace the stock K40 head, which adds two features I wanted, air assist nozzle and adjustable focus. I knew it wasn't a drop-in replacement, and there are 3D printed designs (like https://www.thingiverse.com/thing:3386731) which you can print or buy to lower it by 8-9mm. But I don't have a 3D printer, and it made sense to me that there should be a laser-cut one! I couldn't find any, so I made it!

I've been using my mount now through several projects and it's been just fine. The hardest part is aligning the beam through the small air hole, which is irrespective of mount.

Warnings for the Cloudray head:
* it is of course longer than the stock head, which means you can ram it into the right and front sides unless you keep designs to A4 size. This could damage the head and mount.
* the air assist connection is at a right angle which makes the above problem worse
* some sources recommend installing a rubber washer between the lens and the scre