For what it is worth, my last truck was a 1999 F350 dually which I had for 15+ years. I bought it new with the aluminum wheels on the front, aluminum wheels on the outside rear, steel wheels on the inside rear, and a steel wheel for the spare. My solution to the dually tire rotation problem(s) was to replace the four aluminum wheels with steel wheels. After doing this, when rotating tires, I was able to rotate any tire to any position and I also included the spare into the tire rotation. This solution may not be for everyone, but it worked fine for me.