Ed,
I agree that bagging is still by far the best way to sheet a foam core, therefore I didn't feel the need to respond any earlier. I also tend to agree with farmer Bob in that 6hg isn't the same as putting 3000 lbs on a wing, but is the same as 1500. Really, when it comes to sheeting wings 1500 is way more weight than I'd care to manually stack on a wing, so if I can get the same with a vacuum, that's what I'm doing.
GS