Nice writeup, I recently put a set of Evo X calipers on my S14 up front, after originally looking for VIII / IX calipers. The X rotor setup is significantly larger at 13.9 inches, and I'm running a carbon Centric setup with a 17/16 BMC.
Don't want to jack thread, but the writeup can be found here :
Project 240SX – Installing EVO X Brakes | StockSpyder