Sorry Grant, I'd forgotten. You did mention that.
But, it's tricky to fit and get the bearings adjusted right, that's if you've got the tools to reach inside (and then remember the right way up for the bottom ball race and get it back in without the balls falling back out without using grease. Has to be fine oil only) and solder tiny wires at silly angles as you do it (three handed job). Oh and you have to figure out whether the belt goes back on with the bias helix extended or contracted. That'll take a couple of goes and also you have to get the adjuster dial exactly in the right position, otherwise the dial markings will be meaningless. It was a pain to do. I know, I had mine apart several times just to get it right.

