Rob if you turn the diameter of the front tires down it should also lower the guide deeper into the slot. No wheel or tire change, just sanding the fronts down. 0.5mm reduction actually takes 1.0 mm off the tire but only lowers the guide down 0.5mm.
It's like all the clubs as it depends on the rules as to what you can do. So as you suggest there is more than one way to skin an apple.
Bob