I'm not worried if I need to mail sashing with the row. I'm not for sure that I'm going to do sashing. I have my row for group #2, but not for our group yet. I'm thinking of black and white and maybe emerald green in traditional or modern blocks.
If it's ok, I will send out a label ready to go and each person can sign it. Mailing early is fine with me and a letter or drawing or whatever works is fine for conveying design/vision/theme, etc.
I don't have much experience with applique or embroidery.