Blender doesn't support STEP file import or export, so it is not a viable CAD program. The add-on is probably great for creating dimensioned parts for use in an

Blender doesn't support STEP file import or export, so it is not a viable CAD program. The add-on is probably great for creating dimensioned parts for use in animations and other things Blender does. But there is no interoperability with manufacturing or simulation tools.