Well, I’m sure I would have the patience to turn the first gear long enough to move a gear 10-12 down the line, but moving a gear directly? Maybe 4-5, I’m not sure of the strength involved….
I’ve built a few Lego gear stacks in my time. I’m going to say 7, maaaaybe 8, but beyond that you’re at 1:256 even assuming no resistance, which is A LOT!
I would absolutely work at this until I got the bottom gear all the way around — it’s about the only fidget toy I could consider carrying/fidgeting with (at least until it was all the way around at least once).
It’s is all about you mind set and the ability to focus on this unbelievable work of art I believe I could work myself down to the 9th gear but the enjoyment of just using it I believe I could do all the gears just a little patience and hand strength