I began making this scarf in FEBRUARY for a friend's birthday in JUNE. Yup, just made it.
No, this wasn't a hard thing to knit, I just didn't knit on it too steadily. I decided to make the scarf reversible by using reversible cables. Basically, a reversible cable is created by knitting them in 1×1 rib. I used multiples of 8 stitches to make 4 over 4 cables. I decided to mirror the cables and cross them every 8 rows. See not hard at all.
So the "pattern" is cast on 56 stitches with size 6 needles. Knit two rows of 1×1 rib. Change to size 8 needles and knit on in 1×1 for another six rows then make your cables. I decided to slip the first stitch of each row to make a cleanish edge. I knit on until I was about to run out of yarn and then switched backed to size 6 needles for two rows and cast off. Block and gift.