The game seems to be missing a way to merge Items other than to just input them to an existing belt.

I propose that the following be created:

• a Merger that can take 2 input and have one output
• a Priority Merger that can take 2 input and have one output. It would be optimal if side that is to be the priority input of the merge could be chosen.

The use case for this is often encountered when having to supplement belts with items, but not wanting a ½ and ½ split.