[Cobra #3170]

I sold my triple Penske's and bought double adjustable JRi's. They are designed by Jeff Ryan who designed Penske's. He has made substantial improvements in the the JRi vs the Penske. The JRi has an adjuster the works directly on the valve stack which gives a huge adjustment range without requiring a revalve.
They can be adjusted to the point where the car is undriveable which can be a problem for some. My shocks can go from a 300# spring to a 1200# without taking them off the car. They are not for everybody but we really like them and rarely move them more than a few clicks either way now that they are dialed in.
I have seen people put in too much rebound to the point that it jacks the car down till it is bouncing on the tires, that is a range of adjustment!
I went with doubles because some of the engineers don't like the time delay associated with fluid travel time in the canister hose. Lots of people are using them now with more switching everyday. Shock prices: you generally get what you pay for.