Thanks folks! I happened to have a few seat-posts knocking around, and found one which is obviously "right" .. For the other (n=x+1) bicycles, I have ordered a cheap 'n nasty gauge. :)
@Wakou started
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Thanks folks! I happened to have a few seat-posts knocking around, and found one which is obviously "right" .. For the other (n=x+1) bicycles, I have ordered a cheap 'n nasty gauge. :)