I have been shooting a Sky recurve that some one had glued a solid block of rubber on the shelf. It serves the purpose of a rest. It is just over 1/4 inch high, I tuned in some 50-55 cedars,but that unforgiving rubber block ate hen feathers. So I took an old toothbrush to the bandsaw and sander. After a few minutes I had it fitted to the shelf and then trimmed it to ensure it was at the right height to get back to square. A little dry time and it is back packing arrows into groups now. Remember those toothbrush rests fromyears ago? Still work, and I only used half of it, so the replacement is ready