Especially for early game, it would be nice if it was possible to reduce capacity of existing storage containers to limit amount of power and biofuel needed for the production line to fill up the storage. Sure, you can put stacks of single piece of something else into the container to block these slots but that only works for the final storage used to manually grab things into inventory. And even as such it still feels wonky and can be easily screwed up e.g. by sorting the storage.