i'm trying to replace a chain, which has a broken pin. i received a new chain, but can't figure out how to remove the old chain from the pedal. i see the screw on the toe board, but can't figure out the other side. do i need a special tool to pry off the small piece with two holes (the locking tab thing)? here is the part i think i'm referring to from the manual: "To change the position of the chain, carefully remove the master link connector from the chain and sprocket and, to adjust the chain, reposition it as desired by moving it to an alternate hole in the sprocket." would really appreciate a quick response, have a show coming up! thanks