What to do when you want to machine precise custom parts but don’t have room or funds for a professional CNC? Invest in a manual mill that can convert into a CNC. Considered a great tool for the price, the X2 Mini Mill is the kit builder’s top choice, and Probotix offers complete conversion kits (see the review) to give it computer control. The platform has an active community, and the folks at CNC Fusion are known for great service. The conversion is straightforward and almost completely reversible, in case you decide to switch back — but why would you?