CNC (and mfg in general) will have different tolerance needs. And the flex on this machine will depend on the material and work speed. I'd probably argue that

CNC (and mfg in general) will have different tolerance needs. And the flex on this machine will depend on the material and work speed. I'd probably argue that anything worse than 0.5mm (~20 thou) will start giving you headaches if your making parts that are supposed to interact with each other. That said, if you're making basically oneoffs and are willing to handfit, that tolerance is probably tolerable (ha!).