Thanks. I did come to the conclusion that it was best to go to another system that's more easily extendable, and sell off the Bachmann main controllers that still seem to do well on eBay.

Will Bachmann ever be making the walk-around companion for EZ Command again? I want to have two operators (my son and I), and we have an EZ Command. The Dynamis system would clearly work but it's too expensive, as apparently you need the command station, then the Pro box, and THEN the second handset.

I've had ZERO luck locating a walk around companion controller on eBay and many different online hobby stores.