Hi Irving

Hmmm! year batch didn't look at that.

Took the gear cog off and its definatly the bore ie the person must have hammered? it on because the damage indicates the pin on the shaft didn't line up with the cogs pin cutout,Im summizing he's changed the gears for the threading gears at one time and hasn't relocated the main gear cog properly?

Well its not that noisy just whirring noise.