Hi, I had the same problem when I got my A20 Max.
It may sound stupid but i bet you have the main power cable going into your air assist and the air assist cable going into your main power adapter,
Just swap these two identical cables over and you will have a fully working laser with air assist.
I’ll admit that i felt like a right idiot when i finally figured it out
happy lasering, Gus,
Hi, I had the same problem when I got my A20 Max.
It may sound stupid but i bet you have the main power cable going into your air assist and the air assist cable going into your main power adapter,
Just swap these two identical cables over and you will have a fully working laser with air assist.
I’ll admit that i felt like a right idiot when i finally figured it out
happy lasering, Gus,