If it's even twice as fast as the old one that would still mean it would take a couple of hours to do one batch of tests. I don't think a customer at an LFS would wait that long for the results.
very true but...what if you didn't have to wait. Maybe what the LFS could do is take peoples numbers down and when the results are all complete they could get a text message with the results. So you could buy whatever u needed head out and maybe on your way home or by end of day you would get a message with your parameters.