karter 25. If this guy is an engineer, you should have said " indexable." in mechanical term when you mark something to align, it is "Indexable".........I'am not sure pal. just a wild guess ..........hope i am right..............
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ig. the tape is to make the hole indexable...............
I am no engineer, but I knew the answer. If he didn't understand my answer, he isn't much of an engineer.