You said it Reinz, it does blow.
Richard,
VZ seemed to feel that every set they might send was identical to the one I had sent back to them. They installed the ones I sent back to them on their R9/R9 model without issue, while I could not get them to function for love or money. They didn't even offer to send another set, as they said that they'd seen instances before where particular R9s simply could not wear their grips.
That being the case, I wouldn't be inclined to try gerry-rigging a solution to the trigger group on a fighting handgun. -My comfort level only, YMMV.
The factory set went back on fine, and the pistol functions normally. That of course is the most important thing and, it seems, what I will have to be satisfied with.
-Which as noted, blows because those checkered grips were sweet!