Which is better, a XMT 350 CC/CV with an Optima Pulse control or a XMT 350 MPa? I ask this because I have the XMT 350 CC/CV and am considering combining it with a possible Optima purchase for use with my 30A Spoolmatic for use on thin (17 or 18 ga.) AL . Is the MPa a whole bunch better, or just the same?