Hi folks I always liked the balloon analogy. Take a balloon and and blow it half way up. Then with a tush pen draw a bunch of equal sized circles all over its surface. When you then further expand the balloon what happens to the circles (holes) ? And what happens when you let the air out a bit (contraction). This analogy came up a few years back when we were scatching our heads about comparing summer/winter tuning pin tightnesses. Cheers RicB
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