This vid is just to add visual information about a bearing trick that I mentioned as a sort of hack in the previous video.  It may be a cheap way to help folks with slight chronic misalignment problems on printers with rigid Z couplings that support the weight of the gantry.

Remember: this is just a hack, but it may well be worth a try since the parts are so cheap.

Here are the links to flexible couplings that I have used in the past.
https://openbuildspartstore.com/5mm-8mm-flexible-coupling/

https://amzn.to/2Ieqtrw

Thingiverse link to the TR8*8 4-start locking collar:
https://www.thingiverse.com/thing:3541492

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https://www.amazon.com/?tag=alexkenisonli-20

Background music by my band Solamors, you can contribute by buying a copy on bandcamp.com, or iTunes, Google Play, etc etc:
https://solamors.bandcamp.com
https://aletheian.bandcamp.com

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