Thanks Alan! I bought the MSA Safety Works earplugs and I made a great pair of foam ear bud replacement tips for my Image S4. Now they sound spectacular and they block out much more ambient noise. I recommend your procedure. I saw another website where they talk about wetting the earplugs, followed by freezing and then punching through it with a hole punch....much too complicated: especially when your method is so simple and involves no glue, freezing, tygon tubing, or dremel drilling!