For the majority of the population this is a good thing. Any micron gauge is better than none at all. Pretty much anybody I've worked around either doesn't use a micron gauge or even own one. I do residential and maybe it's a whole different mindset but I here "close enough" way to often. I hate to say it but I'm prob the only guy at my shop that uses one. So ya they should be built in so you have to use it. If your worried about accuracy then just use both.