I used a dremel and a sanding drum.
I didn't mean that you had to be precise, just that a few thousandths thinner made it a lot softer. While you should try to get both sides the same, it really doesn't matter since moving either wheel bends BOTH bars. Contrary to popular opinion, having one bar harder than the other will not make the car handle differently left to right.
Sean. Certified speed crazed mowron.
Team Shepherd USA