Parametric Finger Pen Holder (Vertical; No Support)

Remix of Finger Pen Holder (Vertical) in OpenSCAD so it's more easily customized. This remix doesn't need support so is quicker to print when using slicers such as PrusaSlicer that would otherwise create large support gantries.

The two parameters are the diameter of the finger you want to fit and the diameter of the pen/pencil/paintbrush/utensil you want to use. Use Volksswitch's Measuring Stars and/or Parametric Measuring Stars to make the measurement.

See earlier remix Parametric Finger Pen Holder (Vertical) for more details. There are probably better AT devices out there: this one is a good quick parametric design demo that can be made during a lecture.

Update, 2020-03: removed code that was generating warnings.