You are a master! My main criteria for a design are as follows: functionality, aesthetics, and print-ability. Your design gets and A+ in all three. I printed mine with PLA, and it works great. I'm only using double sided tape to hold it to the wall, and it seems to be fine. The only thing I would change is to add a version that has a 1 inch wide pad against the wall for wider tape (in addition to the command strip version). Even without the extra surface area, mine are hanging on the wall fine. Great Work!