There is a new Pro$%^&* interview covering the Q. Some of the questions you raise can be answered by looking at the DFS. The individual annual bore flows have to considered in the context of total brine requirements of 18GL/year from trench and bores. The economics are based on 245Ktpa of SOP but they will use 42Ktpa of MOP. MOP is obviously an operating expense. The resource size limits SOP production without MOP to under 200Ktpa.
My understanding on the chemistry is basic but the main feedstock is Kainite not Carnallite? Carnallite is KMgCl. In the video Tony says the Kainite salts are 200 or 300mm.
