Screwdriver-, Veroboardcutter-, etc. Handle

EDIT: the automaticly rendered thumbnail of the *.scad file misses the handle because the thingyverse implementation of that can't import STL files.

Just a quick modification to the Handle made by OnShape.
My opinion is always __"do not reinvent the wheel"__, so I took their handle design and just changed it a bit to make it suitable to insert other types of stuff, like in my example for a veroboard cutter drill bits.

Included is the Openscad script, you would need the original STL (included, named "Screwdriver_Handle.stl") in the same directory than the script. Also included is a modified version with a 3mm hole that I needed for my veroboard cutter (the finished product is in the picture).

In the script, there are five options you can change:

__scale_handle_diameter = 0.5;__
Determines the diameter, I wanted a small one so I halved the size.
__scale_handle_length = 1.0;__
same as above just for the length.
__hole_diameter = 3.0;__
the diameter of