... in the same way, "in half," and the "MS" turns into a "2-sided strip with a fulltwist;" indeed, one was ignoring the inside of the ...some of which does work. The other pictures show a full tube when 0 < th < 4 pi. For example when 0 < th < 3 pi there is plenty of common seam length of the twisted tube for suturing along the helical partition line. as a "twisted cylinder," though I...