If you want to run the S gauge Berkshire with DCC by far the easiest and most likely cheapest way is to buy the Legacy version. It will run DCC out of the box. I have a Flyerchief Berk, did not care for it, so it was converted to TMCC using ERR boards along with a lot of separate parts. It does not run on DCC. FlyerChief uses a wired connector between the engine and tender, TMCC and Legacy use wireless. The cost of the conversion to TMCC was more than the difference in cost between the FlyerChief and Legacy engines. I am reasonably certain all the Legacy components are not available from Lionel to do a full Legacy conversion of a FlyerChief engine.