When placing machines on floor tiles, there is some measure of snapping behaviour. It's nice, but I would like to see finer grained control. For instance, when a machine has been placed, allow us to select it and nudge it in various directions by small increments by using the cursor keys.
RIght now a machine can only be moved by removing it entirely. This is rather tedious when dealing with tall stacks of things like containers which end up being just a little too close to a machine feeding into it.