Scott, as I mentioned in my other posts, tweaking is no solution. On most PJs you cannot tweak it out 100%, and if you're stuck with a PJ that has VB, it cannot be fixed and at least opver here you do not get any warranty.
Tweaking was already implemented on the D4 generation. Some got lucky others did not.
Again, it's this lottery that was supposed to get fixed. And it was supposed to be fixed by the panels, not by some patching done in the PJs menu.
What people expected was a PJ that had no VB tweaking in the menu because it was fixed out of the box.
Cine4home's Z4 after tweaking still had VB! Not very badly so, but it was still there.
I've seen a few Panasonics and an Epson, most had very little VB (but I still could see it and was bothered by it), and one had it really badly and no tuning could improve it. In all cases, no return warranty on VB issues. I don't have the money to play this kind of lottery. I want VB free PJs out of the box and a guarantee there will be no VB or I get my money back.
Such a guarantee is not given by any store, not on D4, and not on D5 considering the Cine4home test results.