This topic has been discussed before, I just can't seem to find the thread. In any case, I've heard of people adding switches between the batteries and main board to minimize the arc spark - wondering what you all think of that idea and if anyone has come up with any better solutions. Argument against this seems to be that it adds another potential point of failure. Argument for this seems to be it greatly minimizes potential damage and with a beefy enough switch it's a non-issue. I get sparks nearly every time and the tips of my connectors are charred but there is plenty of clean contact beyond the tips and I have yet to experience problems. But that spark does bug me and I wonder about the long term effects.