This isn't necesarily a 29er only post, but the 2010 Gary Fisher Rumblefish 2 has that new fox shock DRCV (Dual Rate Control Valve) rear shock. Has anyone else ridden this shock? I'm not sure if i had to little air pressure, but i seem to blow thru the travel way too fast. I realize the design behind the product, but doesn't seem to feel effective... any opinions?