I was thinking about going with a Watts Link suspension,not sure I like the Fays2 becauce of the exra weight and the axle clamps, considered the White Line , but in the end I believe the Cortex maybe the best.They seem to be well engineered with options for Diff cooling,temp gauge, and addition of Torque arm. Anyone here using Cortex, how about the Xtreme Grip package sounds good from what i have heard.