Different in application, but similar to what Basis does. Basis put a second bearing inside the unipivot well and use a counterweight with one empty side to balance the arm against the second bearing. The result is a unipivot arm that looks and feels like a fixed bearing design. Absolutely no wobble.
2nd pivot for VPI 3D
The 2nd pivot mod is now available from VPI....interested if anyone has any thoughts on it ...are using it,?