Coal and sand go on the outside into the phase bridge - to the opposite side of their inverted sorters near the bottom. The inner pair are both lead, because it takes more than one (and it is doing weird things with it down the center line). Titanium and copper go into the middle - again reversed vs. the inverted sorters in the middle. (Changing the inverted sorters lets you reconfigure this.) The items sources in sandbox mode show the feeds, and then the row above shows the alternate feeds - but they won't build except in sandbox.

where do i put what?