All previous William's product offered in 3 and 2 rail. Both come out of the box running conventional, but with plugs/slots inside to easily install Digital Command and/or SOUND as upgrades (also available from Bachmann) as I can afford to do so.

DCC for 3 rail (AC) would be neato. I'd buy it, as long as upgrades were also available for me to upgrade most (if not all) of my other older AC locos at a reasonable price.

Just fantasizing. 

Bobby