Yes, it uses Pro 4 wishbones, rear hubs, c-hubs, steering knuckles, toe blocks, and a few other minor bits and pieces.
I got most of the build done last night, the quality of the parts is impressive, and it is a very easy build, but I also noticed as many other people have that the rear diff has a lot of play in the pulley, has anyone found a fix to this yet? I did use 2 bearings instead of the bearing and 2 spacers as Zombies suggested, and I also tried a few other combinations and nothing got rid of the play. Having said that, it doesn't seem to make any difference to the performance of the diff, it seems nice and smooth and tight too.
Another issue I had, after looking at the instructions a few times, and the ammendment sheet in the manual (yes, I got one in mine!) was that the one-way pulley seems to rub slightly on the spur gear plate, or more specifically the screws. I'm not sure whether it's because I used my titanium screws on it or not, but all the other screws are flush to the carbon fibre and these ones seem to stick out a bit. Has anyone else had this issue?
So far I am quite impressed by the build quality of the kit, but the drivetrain doesn't seem very free, but maybe that's just because I'm used to the freeness of the Pro 4