Version A6 - Customer "We recently purchased a refurbished Mitsubishi MDS-B-V2-1010 servo amp from you. This was in June or July. I believe that there is something is defective with this amp, as recently the Y-axis servo motor will vibrate when at idle, and sounds ‘rough’ when jogging in the Y-axis travel. " It was past 30 days, we sent replacement with rush fee $250 as per roberto. They returned replacement return 51654.