Thank you for the drain pipe feature. I don't mess up often, but when I do, it's always a lot of work to fix.

Does it increase pollution, when I flush all the liquid from a pipe or is the operation for free?

While I love how the new drill looks like when it's standing on it's own I don't like the mess my mining field turned to. It's very hard to see the belt that is behind the drill and spot problems - a mis-rotated belt for example. Another issue is, when the drills are slow moving (= no modules) it's ...