Hi, the turrets are identical in design but are 180 opposing, so yes if you have a holder in the upper turret facing hd1 and mounted it on the lower turret it would face hd2. If you are looking to buy a machine, be sure to include as many holders as you think you might need so as to get them at a discounted rate as a package. Unlike face mounted vdi, these are pretty expensive...for example a 1.25 boring bar holder is just over $600.