I am thinking of getting a santa cruz blur and am debating which rear shock I should get. Fifth element air or fox float R? I know that the 'leaking damping fluid' from the fifth is in fact a greese that progressive puts in their shocks when they build them . The progressive has control valve damping and a large air can, perfect for the blur's VPP system, but they only came out a few years ago, and fox has been around for much longer. weight is definatly an issue . thanx!