Hello all, I have made small samples of double knitting (not the more complicating one with color, just the one where you knit 1, then yf and slip st as to purl- for every row.) Now, the tube is closed on each end but you can feel it if you pull the fabric out. Well, I wanted an open tube when finished...so, I BO in the regular way, thinking it would create that open tube, but of course that simply closed it shut. So my question is: how can I BO to keep this open? Thank you!