its also hard enough to beleave that 6 vecs can be stored in the garage
if those tanks can store half of what a smelter can, and thats their size, I dont see why you couldnt fit 2 of them in a smelter (ie the size makes since)
mabe have somthing for reshurch like advanced storage or somthing, that adds even more to the storage of the smelter
anyway, the intial version of op3 will probly be lacking some buildings and vecs, but as an ongoing project, I dont see why he couldnt add things like ore storage later on
of corse its all up to knux