I agree with Downunder, I have used pantyhose and an O ring and have had no trouble. I used it on a ThunderTiger Pro 61 and its works perfect. When the hose gets dirty and oily, just cut you a new square of it and replace and you're good to go. I do wait until my pantyhose starts looking ratty and torn and not fitting me very good before I use them on my engines though (sorry, I just couldnt help it .LOL No, I dont swing that way, heheheh!!!
John