DRO with ball bearings

As far as accuracy is concerned, ball bearings in a tube would be the
quickest way to an accurate scale for my primitive shop. How are these
read out and can they have a fast update rate?

Thanks,

Clint

What if someone posted a for sale item and only people who wanted to buy
the item responded... Lets face it, the follow-ups are much worse than
the original posts. Please don't post about this comment, it's not worth
the bandwidth...