Strange though. I figured 47 Labs would use a linear tracking arm since they made the Pi Tracer that way. This doesn't look like it has a linear arm. While two platters spinning oppositely may cancel inertia, is inertia a bigger problem than overall vibration? Because you're going to have more with this setup. Not knocking it b/c I like 47's stuff. Just curious.

I think to devote engineering efforts on a turntable arm, to be excellent and be linear tracking might not be worthwhile at this time. Therefore, I believe of the use of the arm in the turntable...that arm is not a regular one either, it is the RS lab one, which has a weird cantalever design and supposedly sounds great...also not being terribly expensive. Two platters rotating in opposite directions....hum, intriguing, I wonder what would be the different with a regular, either light or dense platter.

It looks like the RS Labs, versus 47 Labs, tone arm. I reviewed it a ww.wpositive-feedback.com and it is very nice and quite inexpensive. Excellent bass and imaging. It's a little weird/scary to use initially because the cartridge swings around a 6 degree pivot (three degrees of pivot in two directions) and it looks like the first time you drop it into a groove that the cantilever will tear off. No such problems. It makes sense that the big bucks go to having a platter spin in opposing directions. Probably a very nice table.

You guys are the 84215 best, thanks so much for the help.