Parametric Pen Organizer

This is a parametric pen organizer. It is especially designed to organize
fountain pens. The pens are laid down on card stock to prevent the plastic
from scratching them. The number of pens and their sizes can be customized.
Tools are provided to help the customization process. Support is required only
for the handle of the trays. The support should be set to 'Touch build plate
only'. An infill of 20% is suggested.

The example implementation provided through the given STL files generates pen
trays of 100 mm x 200 mm along with the tray holder. Each tray holds 5 pens.
Besides the pen trays, you will need to prepare card stock inserts as
described below. You will need to do so pieces of card stock of around 199.3
mm x 143.5 mm as given in the spreadsheet. Also, you will need 2 pieces of
card stock to be put at each end of the trays of about 25 mm x 143.5 mm.

You will need to print InsertRuler.stl to prepare the card stock tray. You
will use it to score the card stock for the tray inser