James, If you wear low cut tennis shoes, you don't need rubbers. They're not much better than socks for supporting your feet. You must sit down to tune. Because I stand all the time, I have spent good money on well-built leather shoes which support my feet well. That's why I don't want some fussy householder to tell me to take them off. Anyhow, the rubbers work for me. Thanks for the compliment: "my young friend" but it's not true. Ken Burton
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