Although they do a press-fit test, what about the outside dimensions? What about material quality? The purpose of geometric tolerancing a design is so that whe

Although they do a press-fit test, what about the outside dimensions? What about material quality? The purpose of geometric tolerancing a design is so that when you assemble all the pieces together with varying tolerances, you have a good chance that it will all fit together. I've worked with machines with stepper motors in the past and they can get out of alignment. Don't get me wrong. I think the whole maker movement is really cool. I'm just saying that manufacturing a quality product is not easy. I'm even thinking about buying one, however, if I bought a kit and the pieces didn't fit together very well, that would be frustrating.