they still have the old slider on the reg DMCC/SF45 highback lol. Probably cause the non-slider versions have those foam blocks that look like they could pack-in over time, giving everybody those urethane stabilizers was prob a good idea, so are the diff main straps. Also it seems like they lowered the carbon mix in the DMCC light? Actually sounds like they made it significantly softer, fair enough as people were complaining about mismatch between base/highback flex lol. Burton has that hinge lateral flex thing on their diode too, and yet flux is still sticking to their principals of making a very stiff binding. Can't wait for someone to review those ultima highbacks.