G'day Norm,
You might be right there. I've not had a deck apart but will need to soon as the bearings are getting v noisy on the daily drive. I'll be very interested in what you find. I think I recall that the tractors are a LH thread - but of course that beastie chutes to the right and so is probably opposite?
Superdooper might know. Super, you out there?
Cheers,