I was using Red earlier today. I got through one short etching cut and one short cut but then I did a cut that didnt finish properly and I started getting an error message that said 'Please Install Cone before Using Air Assist" I did the general trouble shooting stuff and checked the laser end and it looked fine, so I’m not sure what really happened with it.
I looked up the laser maintenance doc and it looked kinda beyond what I would want to mess with.