Originally Posted by
tr1kstanc3
What's the best way to take 1mm off the spec-r gear diff casing? Are you taking .5mm off each L/R side? Somebody mentioned using a truer but I do not have access to one. I have a dremel, sandpaper, and files.

I did it with a dremel and cylindrical grinding stone. You don't have to use much force, and make sure to even it out around the whole circumference so that the bearing seats properly.