Parametric Lego Technic Rack.
Following parameters can be changed:
NrOfUnits = 4; // [3:100]
AddBottomPins = 1; // [0,1]
AddHolesAtEnd = 0; // [0,1]
EasyPrintable = 0; // [0,1]
if the parameter "AddBottomPins " is set to 1, then bottom pins will be added (unless also AddHolesAtEnd is set to 1).
if the parameter "AddHolesAtEnd " is set to 1, then holes will be add at the end of the part.
If the parameter "EasyPrintable" is set to 1, then the part will be still functional compatible, but much easier to print.
To get a nice fit with the Lego pins and axles, it is recommended to drill the holes with a drill of diameter 4.9 mm.