Hrm, I understand about cobblestone, but what about putting dirt into collective storage?
I also put sandstone in there, which can double as smooth sandstone for collective storage since its input is equal to output.
Oh yea, Bla, the teleport coords for the collective storage is -742, 55, 1268, that'll put you almost in the middle of the room, although if you don't mind teleporting into the ladder shaft, -740, 55, 1269.
Also, I decided to go ahead and build the road and the bridge. I went and did the required 20 blocks (meters) from the station as well.