I must be in this for the long term now.
I tried two lengths of picot edging from etsy, same seller, one was fancy decorative edging, the other not fancy and both were nice but the fancy edging is gorgeous and soft too. I had a money off code for more purchases and have bitten the bullet, bought two x 100m reels, one black and one white
I have been very happy with my handmade knickers and will stay with the kwik sew pattern as they are the most comfy for my womanly shape. There are similar others btw, kwik sew is no longer sold. I have some beautiful lengths of stretch lace, for future projects, or maybe to top-trim nighties as I have two lengths of silk.
The knickers wash beautifully. The only alteration I will make is to be more specific with leg trim length and will measure the whole leg opening and only take 2" off the trim. Waist trim will be just about the same as the fabric, both can then stretch the same when wearing