srp,
They (the people) do already know about it. It's not something we hide. The older machines we had with Mosfets were problematic. Once the bugs were worked out, they generally worked fine. Jakeru likes his machine, but he has worked on it some himself. But Mosfets today even though they are better aren't as good as the IGBT machines. I think the 160 sth is better in general, and probably stronger on 110V. It's not just amps, you are fooling with. It's volts as well...which is actually total wattage.