I have been at Automation technologies Inc., - mostly empty warehouse - very remote location. I assume from your question that you will be looking at CO2. I really doubt that Automation technologies Inc., will give you any support if you will be having repair problem or technical one, they are only re-sellers I guarantee that they have no repair and support and knowledgeable stuff. When I visited Automation technologies Inc like 4 months ago - i was physically inside - 4 people, - 1 boss, 1 lady -paper work , 1 walking around guy, and 1 knowing nothing about laser asking the 1st walking around guy where to find another box. If you are looking for co2 get something like that which was 35 000 - 40 000 and is in pristine condition, plus you don't need any water cooling,
https://www.ebay.com/itm/323939952070
working
https://www.youtube.com/watch?v=J4Ij4362gUc&t=487s
or
https://www.ebay.com/itm/274075000501
I can give you more info if you want to, where to email you. Kind Regards.