I've been cutting and engraving a few test pieces, mainly MDF or softwoods while I learn more on the CAD and tool-paths. And remembering to zero Z after a tool change.!
First "proper" project is to make a dust shoe - I figured it'll end up slightly cheaper then buying and be interesting working with cutting plastic.
So the one I'm making is the Avid CNC one, using magnets to allow removal of the brush https://www.cncrouterparts.com/unive...hoe-p-396.html.
Helpfully they provide the fusion design with parametric value, so it can be edited to hose/spindle size. I'll be making it out of HDPE plastic.

I'm also thinking about trying some aluminium and wondering do I need a mister, or at least air blast to do anything more than minimal work in aluminium? Or would the dust collection remove chips enough?
I have one of these basic eBay misters https://cdn.thingiverse.com/assets/f..._Collar_02.png but no compressor yet as most things I read suggest you need a fairly decent tank size to prevent overheating.
I also looked at silent "dentist type" however the price goes up a fair amount!
Any advice from those who have "been there and tried that" :)