Self Taping Threaded Holes

This submission was inspired by "Made with Layers (Thomas Sanladerer)"
youTube video: A better way to add threads to your 3D prints.

Modified the 3 flute profile from Sandladerer by adding more flutes.
Did this to provide more material for the bolt threads to grip against.
Expect that if anyone puts these into an Instron machine, the holes
with more flutes will give more pullout resistance.

Provided designs 3, 4, 5, 6, and 8 mm holes for both the standard 0.4mm
nozzle, and the 0.6mm nozzle I use for carbon fiber polycarbonate
prints.

AI advice for depth of threads for 3D prints was 2 to 2.5X the
bolt diameter. Designs provided are 5X the bolt diameters,
Both thru-holes and blind-holes should be easily made with
Boolean difference functions in your cad program without needing
to cut-paste-laminate the provided hole designs.

Included the spreadsheet which shows my calculations, and the
web pages from which the dimensions were obtained.
Used 0.2mm for the flow spread from a 0.4