For those members that have worn pins, keep in mind that the slipping in and out of gear with the pto shifter usually doesn't wear the pin down like this, it's usually the worn splines on the end of the trans shaft that causes a continuous driving force to disengage. Sometimes the pto shaft splines are also worn and the sliding clutch hub wiggles adding to wear. Don't forget about the pto pilot bushing worn out too. A perfect pto assembly stays locked in with no reason to wear like that. My .02
Rick