Biggest problem with most tanks, Tamiya included, is the electrical connectors are aluminium. Just run one for 10 minutes at more than half throttle and then feel the connectors. They are hot. That's resistance. Putting in the deans plugs or clones thereof solves that problem, no heat, and more power when you need it. I also replace the stock aluminium motor wires with copper wires. However, I would not dream of opening the Tamiya DMD/TO system to replace that end of the wires, although I do cut them short.