Enables merging of multiple chests into one entity. Supports merging of arbitrary number of chests (configurable in mod settings).
Mods introducing new content into the game.
More than just chests.
Reproduction:
Connect a green wire from a merged chest to a pole.
Blueprint the chest and the pole.
Use the blueprint.
See known issues with 1.8.x here. I still didn't resolve it because factorio API didn't support it last time i looked (about a month ago). If you have idea on how to fix it, I'll be glad to hear it and implement it.