The GR510 makes a fantastic drill press, a BIG drill press. And I am not joking; we have a GR510 that spends 90% of the time drilling and tapping holes in lengths of hot rolled steel and drilling holes in thin wall tubing with the occasional light facing cut. For the application you describe in your other thread it would be ideal.
Regarding the 'vegetable oil' dispenser for drilling/tapping copper the salesman may have something useful. Copper, especially soft copper, is a pain to drill and tap and the old fashioned lubricant to use for it was lard.