How to make this seamless:

1) provisionally cast on 1/2 the stitches required and skip to the 1x1 body section

2) knit 1x1 rib for required length

3) increase to 2x stitches, do NOT turn, JOIN provisionally cast on stitches and increase to 2x

4) continue knitting in the ROUND 2x2 rib for desired length.

5) cast off