Well after a bit of fettling mine should be ready... Just waiting for the painter to finish the body.
Did have a small issue with the diff though. I don't think the diff spring is long enough and the plastic nut holder ( with the two tabs which sit in the grooves got bulled down a little when fully tightening the diff ) The guys in the states have been putting a 1mm spacer between the spring and nut holder and this seemed to do the trick. Also while tightening the diff the nut went around in the holder. So I had to dab a bit of super glue in to stop this from happening. ( Probably caused by the spring length issue )
But its now set and ready to go.
Still need a spring washer on the slipper to keep the spring straight