hi
there feels like there is 1-2mm play in the bottom rudder pin. Does anyone know the best way to fix this. Maybe just a bigger pin or some type of shim?
Depends if there is a bush in there or not. If it is a metal to metal and the hole has worn oval then it needs a bush made from an acetal such as Delrin. If it is a bush then have a new one made. If the pin (or actually it looks like a bolt on your rudder) is worn rather than the hole, replace the pin.