I've undervoltaged my S1s and am considering for S3s. But I thought with the right firmware you could undervoltage the S3s directly in firmware without having to do hardware mods or use the HB-lead method like many of us did on the S1s. Let me know where I'm going wrong and whether the mods make a significant increase in efficiency or reduction of J/Gh. If there's a link to a proven/best method that outlines firmware needed, steps required, etc., please let me know. Thanks.