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bbtubaman wrote:IThe problems are the rubber stops make the arm bounce on return and ALL cork and rubber stops deteriorate fast and because of being hit against constantly they dont last.

Maybe that's true for plain old hard neoprene, but elastomers come in an amazing variety of "hardness" or durometer rating. Common neoprene is typically about 70 durometer, which is pretty hard and bouncy.

You can get appropriately-sized o-ring cord in a variety of materials from dead-soft 40 durometer gum rubber to hard-as-a-rock 90 durometer Viton.

You can usually obtain a variety of o-ring material at a hydraulic supply house.

Chuck(G) wrote:You can get appropriately-sized o-ring cord in a variety of materials from dead-soft 40 durometer gum rubber to hard-as-a-rock 90 durometer Viton.

I have used o-ring material on my horns for about 12 years now, and find it far preferable to cork; once you find the "hardness" that works for your horn it will last far longer than cork. No problem with bounce at all if you get the appropriate density. Strongly recommended.

I had a bumper disintegrate in the middle of a rehearsal I while back; I used my pocket knife to carve a chunk of rubber out of the bottom of one of the sneakers I was wearing. It turned out to have just the right degree of softness, and it's still there.