yes initially that would make sense - and who knows depending on how things pan out MNS may even sell the Tanz project???
i would imagine that they may have already selected a preferred supplier of the G in making the current crop of "test" batteries and looking ahead to the requirements of the "gigafactories" should they go ahead - but yes would make sense as long as the G is of the quality required.
actually would like to know where they are sourcing it from ATM.