G'day Norm

That's amazing!

I can say the seller is reputable and used to be a manufacturer.
https://www.outdoorking-forum.com.au/forum/ubbthreads.php?ubb=showgallery&Number=67874

Here's an image of the drive - no gearbox, oil or complex bits.
It was - and is - a brilliant design.

Cheers
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Jack

[Linked Image]