Ok so I'm trying to make a (manual) combined wheat and rubber farm, on the largest configuration, but it won't work. I've got a gearbox connected to a bunch of engines so its got plenty of power, i've got some aqueous accumulators giving it water via a valve, and i've got hatches to automatically give it the saplings and seeds. I put out the stone bricks under it and the dirt on top of that, and it just sits there. Am I missing something?