Tension varies
Cylinder 72 and 60

Set up 4x1 half pitch in waste yarn on 72 cylinder (90 needles)
Leave a long tail (4ft)
Rounds 1-59: work 4x1 half pitch
Round 60: transfer alternating rib sts to the cylinder needles (EON on cylinder)
Round 70: transfer remaining rib sts to cylinder
Round 136: remove 6 equally spaced cylinder needles (66 needles remaining, 1x11 mock rib)
Round 146: remove 6 cylinder needles equally spaced between other needles (60 needles remaining, 1x5 mock rib)
Round 156: transfer to 60 cylinder by putting on a circular and changing cylinders, this will use up about two rounds as the sts are transferred, gradually over the next 10-20 rounds make it about 6 clicks tighter till the gauge approximates that from the 72 cylinder
Round 300: last round of leg
fast and easy heel
52 rounds foot
fast and easy toe