Good question, I'm curious as well. To add to that, I recall in one of the rail videos, the rails had a real sexy radius and even formed a circle; unlike most other games that are mostly linear only movement. But, can they also curve Up? Im imagining setting the mines up in a cargo bay, and the rail system leads them all the way out and off into space.
Then maybe even scoop up the leftover parts of a minefield with a giant mouth/ cargo lock area; like your space whale idea in your ship thread.