A much more solid and adjustable Z stepper mount. It uses the spare screws and T nuts supplied with your printer, and keys into the V groove extrusion. Adjustment is independently in X and Y allowing precise alignment of the lead screw for smooth Z travel.

2 or 4 x M3x10 socket head bolts to bolt the steeper to the mount.
2 x M4x10 dome head bolts and Tee nuts to secure the mount to the frame (from the spares supplied with the printer).