This is a remix of the hypercube Z Shaft Clamp v1.1 and v1.2
I have recreated the original in openscad and then extended it.
Having one of the bolts behind the smooth rod bugged me greatly, so this version you can use the holes left or right of the smooth rod or both. This makes adjusting the position of Z rods much easier
Secondly my smooth rod extents to the floor. The printer can't use this. So this version allows you to set the variable "lowerit" and the clamp side of the model is lowered by the specified amount.
This should give a few more mm in the Z axis without new hardware. I have uploaded a 10mm lower version, but you can set the size you want
Code is mostly parametric, but not 100%
Z_Shaft_Clamp_v1.12p added, same as official 12mm version, with screw cutout and rod moved out 1.25mm