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T206Collector...but if you take a 5 with rounded corners and you trim them to sharp corners you get an 8. If you trim a 5 but leave the corners rounded, you're still stuck with a 5.
If you take a 3 with rounded corners, it has other problems that cannot be fixed by trimming the edges, usually creasing or wrinkles. With trimming, you simply can't turn a 3 into a 5, but you can turn a 5 into a 6, 7, 8, 9 or 10.