Kossel anti-thrust hard bed leveler and holder

**These bed holders are designed around Anycubic Kossel bed and frame**
*Its frame have is made out of aluminum extrusions thus allowing it be held in place by bolts.
Its bed have three 3.1mm holes.*

Those Kossel printers are awesome, but they have few peculiarities.

One of such is that the bed is round.
The problem that follows is so that it can rotate.
But for quality printing it shouldn't.

So I made this mount for Kossel bed to finally mount it firmly, allow precise leveling, let