The adapter parts to attach the BH tractor seat to the original seat brackets are weak. I have taken a 1/2 inch galvanized pipe put around the pivot shaft to strengthen the brackets. They were bending in, allowing the seat wobble Harold had mentioned in post I could not seem to locate. If this does not strengthen it enough, I may put a pipe between the lower mounting bolts shown just below the installed pipe with a long bolt from one side to the other. If that does not fix the wobble, I am going to build new adapters from a much stronger metal.