I bought plastic rebar chairs for 20 cents each and hot glued them to 4" squares of wood. I also bought steel rods from Amazon and bent them and poked them into the same squares. For heavy cables you will want bigger squares. But I've never heard a difference with mine or anybody else's cable lifters. You can come up with reasons why they should work including vibration, static, capacitance etc. etc.. but I hear no difference with or without them
