You may not be able to rotate the filler. On another forums I saw a write-up about changing to the chrome filler and it said some (can't remember how many) of the screws are dummies. The ability to rotate the filler will depend on which screws are dummies; the real screws may not line up when turned 180 degrees.
Retired USAF, IYAAYAS!
2008 V-Star 1100 Custom Bobber project
2011 Crimson XR with Forged Highway Bars / Hard Bags / Passenger Backrest, Ness parts including Smooth Layback Plate Frame/Mount / Rad 3 Mirror / deep cut grips / drivers floorboards /shifter peg / brake peg / passenger pegs. Witchdoctor black rack, Lloydz filter / timing wheel / VFC III, 7Jurock windshield, Drag Specialties seat.