Well it's been 12 years since I flew the 400 but I cannot remember the procedure for landing on 3 main gears saying to "put all the fuel in one wing...."
That isn't necessary and may just lead to an accidental fuel starvation thus giving you a whole new set of problems to work through.
Landing on 3 mains ( and even 2 ) was not a big deal in the Sim.
That's why it's called the Queen of the Skies...