Harriet Tidball's article from the Multiple-Harness Weaver series in the Shuttle-Craft Bulletin explains how to expand the four-harness M's and O's weave to six or more harnesses. She analyzes Finnish drafts by Perheentupa and Pyysalo, then proposes a consistent unit system with foundation harnesses 1 and 2 and pairs of pattern harnesses for each block. It gives a unit draft, a twelve-harness tie-up for five blocks, profile drafts for the Finnish examples, and full directions for a six-harness two-block transparent curtain in 8/2 cotton with chenille tabby separators.