V slot construction set basic STL files

You can open the original file in openS AD and see each part by replacing the part = "20x End Cap";

with part = " *INSTERT ANY LISTED PART* " ;

and edit dimension with the other commands just below.

requires some knowledge of openscad or coding

I have uploaded here the STLs of the basic shapes from the file for your convenience. all credit goes to RyanMellor