I used 60mm RHS with one side cut out and 50mm for the tyre mount, I fixed the slop by tacking in some spacers actually 25mm rural gate spacers where the pin and hinge fit, that also gave a bit more meat for the pin to wear on, also has a bit of rubber lining just to keep any movement to a minimum.
I have a cunning plan for a spring latch instead of the pin but needs some HD concentration to figure it out but may require taking the whole bar off to complete, too hard ATM.
I have a cunning plan for a spring latch instead of the pin but needs some HD concentration to figure it out but may require taking the whole bar off to complete, too hard ATM.