Looking for a buggy project

[BrianG]

In another Hyper8 thread, I was asking about possibly using a plastic/Delrin spur and was informed that the Kyosho 46T plastic spur will fit (with possibly a little shimming). Well, I was looking at the assembly diagrams and noticed that the steel spur has a little "collar" on it that supports the diff bearing. The plastic spur does not have this, so how will this work? Do I just get a different bearing that has the same OD, but smaller ID so it fits snugly directly on the output yoke shaft?

I've attached an excerpt from the manual with an arrow pointing to what I'm talking about.