First of all, this is a brilliant mod and i enjoy moving everything indoors.
But there is one thing that would help a lot. At the moment its possible to put a storage chest of type warehouse (Angels warehouses) outside that it goes over multiple output slots and it would receive items from all the inside spots that are connected, however the same is not true to the factorissimo building inside as you are able to place only 1x1 chest there. Could it be possible to allow any storage entities in the red zone so that if its needed there can be a warehouse type storage on both sides. If that was possible then there would be a lot more border area around that storage entity to put stuff in or take it out. Loaders would become much more useful and so forth.