Added new plastic tubes for x axis bindings.

Added new plastic tubes for x axis bindings. They work great! Ask @Whosa_whatsis for details and if they will apply to your bot.

They’re what I use on my Prusa as well. They don’t suffer from being hung on by the X axis, they keep rotational position accurate, and they allow the Z axis threaded rod to float in the X/Y direction freely.

Very nice and funny :slight_smile: