Rumor has it that Volcano is trying to adapt to Millenium Force's three train operation to increase its ludicrously horrible capacity. Don't know if it's true and I don't know if it will work. Speaking of which, the dual station stuff is sadly a load of crap for capacity, especially with Kingda Ka and some others. Storm Runner being the only exception (although the crew needs to be at their best). Top Thrill Dragster has a surprisingly effective station also, with two trains unloading and the other two loading at the same time. It manages to keep the line moving at all times.