Can you do citrus fruits without this attachment (on the Omega 1000/9000 and Acme Juicers)?

The citrus attachment makes the juicer like a motorized citrus juicer, (like mom used). The Omega 1000/9000 and Acme 5001/6001/7001 will juice citrus without the attachment, just peel the grapefruit or orange and put through the machine. (there are inedible pigments in the skin) (Lemons and limes can be cut and put in whole). The attachment lets you cut the orange in half, and "ream" it, thus producing juice faster. When juicing the whole fruit without the attachment, you are getting more nutrients from the fruit, since the white "pith" contains most of the nutrients.