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.
Been awhile since you mentioned you were thinking of adding vertical versions....
I've been looking into dynamicly joined chests. You would simply drag chests and it would join into one chest (vertical or horizontal). But I had to much work lately and can't work on this now.