I have been working with K.O. since 1996. I respect his knowledge and expertise on the art of making trumpet mouthpieces. I have been playing the 3F VR for commercial and 3C VR for legit playing since April and am loving the sound I am getting with these mouthpieces. They add a unique dimension to my sound that other mouthpieces could not produce. Kudos to K.O. and his hard work!

Chris Hammiel
USAF Heartland of America Band

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