I have been working with the tubular cast on and I have found that the subsequent 2x2 ribbing is quitea mess. I hope tye pictures allow you to see the issue. The columns get wider as at the cast on edge and the left column seems to veer over to one side. I wonder of this has something to do with my tugging on the yarn to close the gap between the knit and the purl stiches? I do not use a provisional cast on for this method.