Seconded on the coil Sektor thing. I wanted to transplant the rebound damper from a Revelation into a 150mm Coil U-Turn Sektor, but as above, the negative spring on the coil Sektor is part of the rebound damper and in the righthand fork leg, so the Dual Flow rebound gubbins won't work, or if it does, you'll not have a negative spring and presumably small-bump response would be borked as a result. Not a problem with the Solo Air versions, which I suspect will be a straightforward swap. I'm waiting for Push to bring out an upgrade for the Sektor, though it's a nice fork anyway, particularly at the price.