VPI 2nd Pivot for 3D

truth be told, I never had any problem with either the 3D with or without the 2nd pivot or the metal VPI 10.5 arm with tracking any record I have.  I found the 3D a major improvement to the metal, and the 2nd pivot to be an even bigger improvement.  Some have voiced the opinion, that the single pivot arms "feel funny", but once lowered onto a record, the stability problem is eliminated. 

Dear Stringreen,
I think what Raul may be referring to is the eccentricity as the uni transcends a warp. If you videoed it then played it back in slow motion you'd see the cart wobble from side to side. My guess is that the effect might be worse with line contact and low compliance but the fact is that folk have been using regular unis for years and are unconcerned by rumours of eccentric behaviour. It goes without saying that in the general sense increased noise (for example) during the warp is often expected.
 Gimballed arm users needn't feel too smug because warps seldom remain in the same lateral plane as the cartridge but there is no active compensation other than via the cart's suspension or the cantilever. ;)

If there is a contest between the SL1200G & the Prime, this modification ups the stakes.
Happy listening!

Until I found this thread I wasn't even aware of this mod.  Just ordered mine and will report back on my experiences with it.  I haven't really had too much trouble with the unipivot, but the comments I've found suggest that the other pivot is a bit of an improvement.  

I didn't care much about the wobbly unipivot. For me the improvement of the 2nd pivot is mostly sonic - in imaging and dynamics - and also the fact that you can easily adjust the azimuth without altering the VTF.  

On a note of clarification when I mentioned the effect might be worse for line contact I was of course referring to the listening experience not the "wobble" effect ;) :)

If it is wobbling then spherical or elliptical might notice it less ;)