If you recall I had posted making replacement large format letters (dressage coordinates are based on a series of letters related to German medieval court layout) for our indoor dressage ring out of Draftboard. We finally got them all installed (everyone is very happy given how much thinner they and draftboard will give compared to 3/4” plywood, so as not to break a knee when your horse rubs you on the wall). They are all attached via VHB tape
Here is my horse Luna (my wife is riding her). For those who are curious my horse is a 16’2 registered appendix (out of the Virginia Tech breeding program)
You can see the old style under the. I viewing room window)