I’m pretty much a newbie to CNC. I have an XXL and I purchased an HDZ unit from Mr. Beaver (Still waiting on it arrival Luke, if you see this). Anyway I’m thinking of adding a spindle and VFD to it. 220V. is not a problem for me. My question is air or water cooled and how many watts is recommended for good wood results. And maybe some light aluminum work in the future. Any links for this hardware would also be appreciated.