NOT! If the loop is made correctly, you could twist the string 10 times and it would not come undone. The problem is that there are some loop making fixtures out there that are poorly made, worn out, poorly designed, poorly maintained, etc.; you pick. The good String makers are aware of the fact that the loop is a critical part of making strings and strive to make the loop "goof-proof", IMHO Regards, Joe Garrett, RPT, (Oregon)
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