If someone had swapped these without telling you it might be years before you notice. However, now that you know, you'll convince yourself that this is why you couldn't climb that steel hill yesterday.
For practical purposes, you might actually notice if there's a specific hill that you were just able to climb in low, or one where you couldn't decide between low and 2nd low. Otherwise, it's less than half a step, and as I said, you wouldn't have noticed unless you already knew.
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Chain-L site
An ounce of diagnosis is worth a pound of cure.
Just because I'm tired of arguing, doesn't mean you're right.
“One accurate measurement is worth a thousand expert opinions” - Adm Grace Murray Hopper - USN
WARNING, I'm from New York. Thin skinned people should maintain safe distance.