I use a little slice of shelf liner (the rubbery kind) and some E6000 to make the non-skid pieces for the back of my ruler.
Really great ruler work here. Keep going!
You did a great job on your block. I am hoping to learn some ruler work...Are you teaching yourself or is there a particular tutorial that you found helpful?
Teaching myself with some help from Angela Walters on YouTube. Also one of her books.