According to the Master Sett Chart, Harrisville Shetland warp and weft for plain weave should be warped 8epi. According the chart if I want something heavier, I should weave twill at either 10 or 12 epi depending on how dense I want the fabric. Problem – the warp and also the weft of my project are alternating green and white squares to produce a green/white check. I don’t want the diagonal lines of the green and white squares to show. Since what I want is plain weave all over, can I use either 10 or 12 epi and treadle plain weave? Or will this cause problems?