It's not uncommon to have .00x's and within thousandths of the dial, I've been racing 25 years, three track championships when I was able to race every week, and the closest I have had to perfect was my last race, .000 and dead on with a .001 over. I think the early days of those boxes they tried to be too perfect and their runs stuck out like a sore thumb. Anyone smart enough to use one now would vary his runs enough not to be suspected.