If you can not work it from the title I would like ender drawers, which can be liked maybe something like, chicken bones' ender chest, so you access stuff in drawer for multiple locations, they should be able take all of the other upgrades but unlink, if upgrades are different on link drawers, ender compacting drawers would be nice, an ender control might be going a bit to far, but would be nice to have one controller by drawers, and a link one hooked up to an me network or in the main base to empty your inventory.

Basically something like Resonating Barrels from JABBA? Yes, please!

It's been requested a lot. Since JABBA doesn't seem to be going anywhere, I may give it renewed thought.

Else I could imagine some kind of tesseract connector between two independent inventories in order to make them equal.
Or some kind of remote wireless controller slave. But this might be more difficult, because you'd a reason to limit the inventory size.