Yeah, I run Duff's coils. I tried Wildhorses and I didn't get as much flex. When they wore out I went with Duff and have no complaints. The wristed radius arm helps add flex (releases the bind in the C-bushings and allows the coils to move indepedently of each other). If one tire drops in a hole the truck stays level, just drops the tire in the hole. (see below photo for idea) Makes it a soft ride off road. Its alost like a cady off road... Run one shock per corner like Duffs 70/30 (70% rebound, 30% compression) this way you use the coil to dampen the bumps instead of the shock. Dual shocks are a harsh ride unless you jump your rig then you might need them.