Is the front Ski locker also factory?
I would recommend buying about 1000lbs of fat sacs and placing them evenly around the boat. The LS is the direct drive version. I would suggest 2 side bags (350 each) on each side of the engine and another bag in the front (250-400). I dont have a mobius, but I have a DD boat and that is what I was doing when gas was cheaper. Only problem with all the ballast is increased gas prices. Go big or go home...right?