GitHub - krisgreg/modular-chests: Modular Chests is a Factorio mod that adds a modular chest that merges into longer chests when placed next to each other. Primarily intended for loading and unloading trains.
factorio Wide Chests mod - lttlword
Merging Chests - Factorio Mods
Miniloaders and merging chests make for the most satisfying train stations : r/factorio