New machine on the way

[Davek0974]

Theres lots of laser stuff on youtube - optics setup, tuning cheap machines etc.

Yes you will need air blast, not so much for fire prevention but to keep the front optic clear of the muck thats produced when cutting. Most of the smaller machines use a large aquarium pump so no great pressure is needed here.Water cooling for small <50W machines seems to be just a small pump in a bucket of water!

Air extract is needed or at least a very good idea, especially if cutting plastics, usually they come with a small fan but seems most people duct it outside and fit a bigger fan.