I am very attracted to the Acorn system for ease of use and setup. Was talking to a guy at work that sets up and configures our robots and ..well hes a servo guy...hes been helping me plan a cnc milling machine..atleast the control aspect and motors. Told him that i was considering Acorn CNC. ..showed him the first "features" page and he was like ..well its not closed loop. He gave me a crash course of what that means. Is that a big deal? he seemed to think it wasnt ...uhh Ideal? Am i Missing something? I guess i should mention i havent decided on motor selection yet either.