Hawkeye brought up a very basic and fundamental problem if you really mean that you are reading to +-0.01thousandths! You would need a temperature controlled environment to "soak" the tools and work so that they would both be the exact same temperature. And that would have to be a VERY specific temperature, too, each time you plan to do a measurement. And you couldn't handle the work with your hands since that would warm up the work and change the dimensions. I use to work around a metrology lab and you would need a LOT of very special preparations to use something like this.