o.k., i'm givin it a try. i have fabricated double blade mounts for my 44 toro w/b. the "anti scalp cups" kept me from running them proir to this. after buying new cups in case of engineering failure, and a few naturals, we configured the old cups with the help of a plasma cutter and a grinder to accept doubles. to our suprise, it worked !!! no vibrations, no awful clatter, no nuthin!!!! i will be using them on thurs., i have to be at the fire station tomorrow. i will keep yall posted on how they work!