My recollection about the rationale for lifters is some claim carpet the cable rests on acts like additional dielectric and alters the (capacitance?) properties of the cable. Others claim a vibration isolation benefit. Before spending $ on those ceramic lifters, why not experiment with DIY? Find out if you hear a benefit. I opted to go with some 4" solid wood cubes under my cabliing. Figured it couldn’t hurt. Did it make a difference? Not huge, though I do recall a few days after making the change thinking the system sounded clearer. Had actually forgotten I’d lifted the wiring. I’d call any improvement, real or imagined, subtle, however. See link here:
http://caseyswood.com/shoppingcart/zen-cart/index.php?main_page=index&cPath=12
http://caseyswood.com/shoppingcart/zen-cart/index.php?main_page=index&cPath=12