I discussed the set back of the mistake in knitting with my coach, Jamie, my son. He said that if it showed a lot then I should take it out. Well, the mistake was in the repeat of the pattern over about a 4 inch part of the hat. I spent the evening frogging and trying to get the stitches back on the needles. I managed to get all 160 on the needles, but I need to back up another row make sure the pattern is ok. I will continue tomorrow.