I was trying to test out some possible automation, but when I tried to depower the rails to stop the carts, the carts wouldn't stop. Attached are photos showing this.
Edit:
I just broke some rails to get the carts to stop, apparently it was 3 overlaying one another.
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In that case duplicate of MC-14.
The thing is they did not sustain momentum after I broke the rails for them to stop. The stopped instantly after leaving the rails, They just sustained infinite momentum on my rails. What's odd is I have not been able to recreate this problem.