On Mon, 29 Nov 2021 at 10:02, John Dammeyer <jo...@autoartisans.com> wrote:

> From my perspective most of the bearings in the cup based are effectively 
> useless

I think that the commercial design (with a single oval bearing)
probably controls the shape of the cup better, for an overall stiffer
result. It feels a bit like the difference between a tight and a slack
toothed-belt drive.
(Whilst not being exactly the same)

-- 
atp
"A motorcycle is a bicycle with a pandemonium attachment and is
designed for the especial use of mechanical geniuses, daredevils and
lunatics."
— George Fitch, Atlanta Constitution Newspaper, 1912


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