By using the Air Assist unit the laser can cut and engrave deeper and faster, making the Ortur Master II much more versatile.

See: https://youtu.be/m9faxWKwpkU

The Air-Assist can be printed with any properly calibrated 3D printer that can print PLA plastic. The layer height is 0.2mm and the files must be printed separately from each other. Especially the small clamp part should be printed slowly, otherwise, it will not fit. You may have to sand it to size.

I only offer the Air Assist as a file, and will NOT sell it or print it for others. My day-to-day work and family commitments do not allow me to spend time 3D printing for others. If you want the Air Assist, but you don't have a 3D printer, then use a commercial print service or go to a maker space in your own area, they can help you there.

The files will be shared under Creative Commons - Non-Commercial license

You are free to:
Share — copy and redistribute the material in any medium or format
Adapt — remix, transform, and build upon the material
The licensor cannot revoke these freedoms as long as you follow the license terms.

Attribution — You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.

NonCommercial — You may not use the material for commercial purposes.
No additional restrictions — You may not apply legal terms or technological measures
The license prohibits the application of effective technological measures, defined with reference to Article 11 of the WIPO Copyright Treaty.

NOTE: At a commercial print service, you can get the parts printed in PLA for less than 35,00 Euro shipped to your address. If you have to pay more, you are being ripped off !!!
At my local maker space, these parts would be made for approximately 12 to 15 Euro (no shipping).