Yes guys, double, triple, even quadruple check your soldering connections. It is very difficult to get those 8 AWG wires from the MMM to solder to connectors. I have a 40W iron and it takes me about 90 seconds of heat to get the solder to flow appropriately. If you do not get both pieces of metal hot enough to melt the solder you will end up with what is called a 'cold solder'. Sometimes you can tell by the fact that the joint will look hazy rather then nice and shiny. A cold solder can lead to high resistance and cause lots of problems including extra heat. I still have a v1 first batch running strong, but I have soldered many, many times.

I am sure many know this, but you heat the metal, then apply the solder to the metal, NOT the iron.