I'm working on a cardigan sweater. There is a 6 inch 2/2 rib and then the remainder is St-sts. There is a tip to help provide a good edge on the front. It says, work 1st 2 sts as folls: on RS work, with yarn at back of work, slip 1st st purlwise, k the next st, and continue on to end of row....I'm trying to determine if I start this tip at the very beginning with the ribbing or do I start after I finish the ribbing and do this on the main body of the sweater? Thanks.