I don't know if it's been suggested before, and it may not be a direction you want to go in. However, it would be neat if there were an upgrade, or maybe a block that when placed adjacent to the controller would enable it to interact with types of storage other than drawers, like chests, shelves, barrels, etc.

@ScottKillin asked me in July about creating an addon mod to add this support. I haven't heard anything since, so most likely he didn't have time to write the mod, or was blocked by an API limitation.

I never made a firm decision on whether I wanted this ability to be in the mod core, so it hasn't been a high priority.

Well I can understand if you don't want to go that way, I'm sure there would be a not insignificant amount of work to make this happen also, it diverges from the idea of drawers. It's simply that it would be an elegant solution for managing the disparate storage concepts available in a modded Minecraft game without resorting to something like Applied Energistics, which almost always ends up subverting all other types of storage due to its convenience.

Storage Drawers also seems to neatly avoid the performance issues that arise with large Applied Energistics systems, because Storage Drawers is firmly entrenched as a Storage mod, and really nothing else. In fact the current pack I'm working on, Storage Drawers is the only reason I can avoid adding Applied Energistics.

So even if you decide against adding the functionality I'm requesting here, I am thankful for the mod you have shared with us.

I know it may not be what you're looking for, but until this is a thing, Automagy (Thaumcraft addon) has the Inventarium, which is basically that, a central controller for multiple types of storage blocks. And yes, it works with Storage Drawers. It even has input from the core, now. Alternately, Botania's Corporea system. They both work on the principle of connecting whatever type of storage you're using together into a cohesive whole.