I am knitting a hat whose instructions say to cast on 120 stitches then to place half of the stitches onto a life line. Later they have you attach these stitches from the life line but this leaves a definite row on the inside of the hat. I am looking for a way to attach the loose stitches to the working stitches for a seamless blend of the two and then to keep on knitting. Grafting would give me the look I want but you cast off the working loops. I want that look, but I need to be able to keep on knitting. Suggestions?