I have used the Front SSL on the Front of My +8 Bitsa and tested it on 2,500 miles of varied roads. It does improve the drive on very rough roads but IMO not worth the money. I am now back to Chrome Pins, AVOs, and Blue 120 in/lb springs and I cut the rebound so they just touch the bottom of the stub axle at rest. No complaint about the SSL. Just think My system is just as good and cheaper.
