I think the vid Chop mentions uses the principal- (I didn't check it though) but a week or two after I posted a plan with the method in it Mike did a vid having come up with it interdependently. Attached is a plan with one way to use some of what I did if you were doing a more complicated curtain wall than what I did above for the store front. I'd build the module with a cabinet, convert to a millwork symbol, place, then be fruitful and multiply. There are enough of the parts in there