I have. I have one w/ 80# limbs for sale right now.
I had a carbon before I got the vtm, and I want to go back to carbon, but the RX8, even though a smoother draw (truely did feel like drawing 70 when set at 80), gave up too much speed and i couldnt shoot the distance that i like to. The new rx9 U. draws more like the vtm 34, and the speed is on point. Too much info, I'm sure, but that is why