Nothing more annoying than a dancing stool or chair! Brackets or no brackets, occasionally the legs never set right. You screw one side in tight, let out the other side and somehow, you can’t find the proper balance. This idea works for the screw in type, but you can tack a small piece to the bottom of a leg.
My gasket is made from a coffee can lid. It’s pliable, sturdy and works perfect for the wobbly leg syndrome. It cuts with scissors and can be layered in small portions until you find the perfect balance.
Hope this helpful hint can solve your wobblies! Coffee can (or other flat, plastic) lids finding a new use- reusing common household items at it’s best.