I just took a bunch of basting out of my kilt that I had put in there. I don't know about the PV, but I have to measure the width of the showing part of the pleat at the bottom of the fell, then make sure the pleat is the same width at the bottom of the kilt. You don't have tartan lines to use on your kilt, so the best thing to do is...

Ask The Wizard of BC to explain what to do.