It's nice but ...

It would be cool to have a better way to recognize each arm, especially with cursed programable inserts(by L0771), it quickly becomes complex of what takes / remove where ..

Also, why not the possibility of making ourselves these inserters and thus to be able to merge a yellow inserter with a blue or why not a green: p These would be for the chest to fill up faster than it does not empty.

The problem is the wiring and logical interface: you cannot just click and connect both of inserters, also you cannot open GUI by the second manipulator.
But you can rotate one of them :)