I'm just starting my 4th kilt, a McNeil modern pleated to the sett. Previous projects were 2 box pleated (McNeil modern & ancient) and 1 knife pleated (Antarctica), all to the stripe. The stripes in all of the tartan I've purchased from 2 reputable mills in Scotland are skewed a bit at the selvedge edge. That is, the stripe is straight across the weft until the last 1 inch or so at each selvedge edge. Then it curves slightly, a result, I suspect, of the edge forces generated during the weaving process. I've tried pulling the fabric while ironing the stripes straight. My results have been less than perfect. What is the best way to correct this problem? Thanks