For quite some time I was looking for something to fix the issue with
my dobsonian mount that I had from the start - relatively weak vertical shaft (I modified the drum assembly from front loader washing machine for that purpose), so the whole telescope was behaving somewhat like the vertical pendulum. The Lazy Susan bearing always looked like the obvious solution to this problem, but I never found anything suitable, until now.
Some time ago I stumbled on
very interesting item on ebay... and last week I decided to bite the bullet and purchased 18" version (last one it seems..).
Anyway, Lazy Susan arrived yesterday, it is as advertised - quite good quality, well machined, steel balls all around (they can be replaced from one side hole, which is closed with M5 hex grabscrew), it turns smoothly.
I intend to mount it under the cage as additional bearing, in hope the vibration will be removed... will post how it went when finished.