Does anybody here use DC to DC charging as their primary trackday charging method? I'm using a couple of Etronix Powerpal Touch (the single and the duo) chargers for general AC to DC charging, but I've got a ToolkitRC M6D that's more modern and has better output, UX and is more compact. I'd like to avoid rigging up a 24Vdc PSU into a well-ventilated and finger-safe box. I do own one, it's just not my forte... I'm thinking about grabbing a couple of big 6S 10,000mAh (222Wh) packs and running the M6D off it. I should be able to charge 5x 4800 2S (41Wh) packs with just a single 6S 10,000mAh. The recycle function should let some of the unused race pack capacity back into the 6S, bumping up the capacity a little. Interested in feedback if others doing the same.