Thanks Deejay.
I've seen that part, if I could get this apart I probably fork out for it. I'm now taking a different approach and trying to slide the two large roller halfs sideways away from the gear to get a look inside. Done one side (out of picture side) but the other doesn't want to budge yet.
My step dad's an ex-mechanical draftsman, I'm going to get him to take a look this afternoon.
When I find out the solution I'll make sure to post it into the forums.
