What I was referring to with packing washers was to see if you could find a way to fit some under the orange wedge section to lift it higher in the splines to an area that isn't worn. Sorry, after seeing this mine is a later variant that has the shaft and the wedge mounted separately allowing the mounting bolts to be loosened off and moved into better mesh so my shaft would not be any good as it also has finer teeth and splines.
