No, I got a deal on MrSpeakers Ether - well reviewed by several folks for the 500 (I do not agree). Tried those, stock felts, Delkoni fenestrated, and Fostex 500 stocks. I'm buying ZMF's this week. I should have made it clear that the 500's showed this trait more than the 4xx. I used the stock felt pads for that evaluation since they are the best I have in hand for now. I'll try to mod a few of the pads with more fiberfill and/or plastic tubes to see if that helps them.