Parametric Z-Rod Knobs

Another set of z-rod knobs. All measurements are configurable in the OpenSCAD file. Printed as is will be snug but works well.

Inspired by a few knobs out here, but I wanted to close the top and allow the nut to recess more for a cleaner look. Also wanted to play with some parametric settings for the knob grips, nut and recess dimensions.