This is the weak link.
Kevinakasam belted z axis mod.
I made this as a beefed up version.
I updated my slicer and the head crashed into the bed and broke the mounts. I had to epoxy them as in the picture to print the replacements.
I also included one that uses a 3 mm screw thru the part.
Bottom_623_2.stl | 162.0KB | |
Bottom_623_2_1.stl | 182.2KB |