Is something like this what you’re after? If you set width on docking ports to 0.3, raise the x and y value, and set them up like this, you’ll end up with linear points of attraction which have no colliders. And you could set the forces in them to graduating values, which should give similar characteristics to how an accelerator works?
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I don’t think you’ll reach relativistic speeds, but you should at least be able to scale it enough to blow your phone up..