I agree for sure. I'm just saying the thing works very well a long way from this supposed sweet spot also. Its really flexible it seems which must be a good thing.That "sweet spot" is probably where the device is most accurate based on their code and hardware, and I imagine they had 28ga or thicker Ni200 in mind when they did this. Which is sort of great, with the floor being that low people aren't stuck with using delicate thin gauge wire, or a huge coil mass with thicker wire.
Doesn't mean you can't build on it with a higher minimum resistance like you must on a DNA40. Options are good. Flexibility is good.