I'm using the word imprinting for lack of ever hearing this problem named before. But what we are seeing on a couple different manufacturers on drive and car top sheaves is in the groove of the sheave you get a imprint of the cable lays! The imprint is not cut into the grooves as there is no metallic dust coming off sheaves. But rather the imprint is pushed into the steel. After checking the Brinell rating (hardness test) the sheaves check out to meet specs. Also the cable is correct to the manufacturers spec too. But the imprint is causing ride quality and cable tension problems. Have you heard of this problem? And better yet the cause or the cure for this problem? Thanks Dan