Peggy Sagers’ article on “5 Steps to Perfect Slacks Pattern” in Threads 114 was great. The diagram for slashing and spreading the back crotch, plus adding horizontal darts to correct droopy legs was clear and just what I’ve been needing. I made a muslin from this article right away, and it’s by far the best fitting yet.
Question: when slashing and spreading to increase back length (page 53 diagram), do you need to pull up the waist until the grainline at the hip is straight, or just until you can get the fabric comfortably under the elastic tied around the waist? On my test muslin, the back hip grainline still dips about an inch at CB, but the fit feels and looks pretty good.