I have the Nova DVR XP. I have about 300 lbs of sand on my stand. It doesn't move anywhere. Like Jim K. I can turn 15 3/4" and have had some 8" or so in depth. I use a oneway coring system for nested bowls and haven't had any problems at all. I turned on both the Jet 1642 and the Nova. Both are excellent machines but chose the Nova because of it's small foot print. That was the only reason.
Bernie
Never put off until tomorrow what you can do the day after tomorrow.
To succeed in life, you need three things: a wishbone, a backbone and a funnybone.