I know this is probably a very basic question, but I have to ask it. I have a friend who has a Layout using a Legacy System. He is using a Z4000, a Legacy Base, a TPC300 (to control his conventional and MTH Engines). He wants to purchase a DCS System to control all his MTH Engines, instead of conventional. What does he need to buy AND how does he interface the DCS Equipment with the LEGACY Equipment. How about a block diagram and info to achieve this. I run only TMCC/LEGACY and know "NOTHING" about DCS!!!