PLEASE!!!
#1: Make it possible to rotate the machines!
At least the splitters & mergers!
It would also be nice if they could be mirrored, so you don't HAVE to make a production chain always go that ---> way, but you can make it go back & forth.
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#2: It would also be nice with a hot-bar or/and inventory for machines not in use.
To to remove clutter from the build-environment and easier placement of machines.
#3: It would also be nice if you could maybe shift-click on a connection, to PICK-UP the line that is connected, instead of starting a new line from that terminal.
This is helpful for long cross-map spanning connections that you just want to move to another storage or machine, without having to pan back & forth across the map just to change it.