I suspect you will need a short break in the rails in each loop to stop the two lanes of the powerbase being shorted the wrong way around. Unless that powerbase has a cunning more where only one lane is powered?
I made something similar a while ago and just left a small gap in the copper tape on my rally loop backs to stop the powerbase getting upset. Since digital cars rectify their power anyway they seemed quite happy with that arrangement.
yeah, I'd just connect it so that only one lane of the PB is actually connected. Otherwise, even with the APB and new code, you'd count a lap every time the car crossed either lane of the base, so, an extra lap every lap. ;-)
Otherwise, it looks like a cool idea.
Another idea would be to use pit lane pieces to make the lanes passing the base into two, but that would be more complicated than just shifting the base over one lane and putting a single lane half straight next to it.
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