Z-Axis Bracket Mount
The SolidCore Printer has two different z-axis designs. This z axis bracket design is for the z-axis motors on the bottom of the frame.

Independent Driven Z-Axis Motors / Single Z-Axis Motor
Both z axis designs use 3-point bed leveling.

For more information see
SolidCore Printer https://3ddistributed.com/corexy-3d-printer/
Thingiverse SolidCore Assembly https://www.thingiverse.com/thing:4307266
Z-Bracket https://3ddistributed.com/product/solidcore-z-bracket/