We have been using the EV3 Drack and thnks it’s great except for the battery life. The in box rechargable is so small its won’t make the day. We use a RC car battery to power it and it lasts all weekend! The track map, particularly the acceleration data is critical for tuning, not just the laterial data for turns. If it is not accelerating straight line where it should, we know the jetting is off. If negative g’s under braking are not a certain point, we know we are giving up time under braking. (the driver is a wuss)
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