Quality comments:
...in my bag of 10 balls, I came across a ball that had six knots in it! I had used two other balls and found only one knot in one of the balls. I'm knitting in the round and find dealing with cotton ends difficult, (see my summary above) so I didn't cut out the knots. Now I'm thinking I should frog back in case the knots work their way to the front of my pullover...
