Had a customized v91 which was modded to look like a G3K3. With a DSA 1913 and trilux scope, it was one heavy son of a bitch.
However, it shot like a dream, and the recoil wasn't anything to get excited over, especially from the convex collapsing stock. I only used it a few times as the range, so I couldn't attest to its reliability.
I sold since it was a boat anchor and was expensive to feed. Keep in mind that the port buffer mangles the brass if you have any plans to reload.
Vector service was fantastic. They are open to suggestions for custom work, so you are not limited to their offerings if you can supply the parts. The workmanship was great and I was especially impressed with their refinishing job on my JLD receiver.