As someone with no experience with DCC, if you plan to run it with DCC why not just install DCC? Hard to believe Legacy is less expensive.
I got the answers I was looking for, I just thought that I could unplug the chief boards and plug in the legacy boards. But that is not the case, and to install DCC sound decoder to keep the smoke unit is not cost effective or cheaper than just buying the legacy berkshire.
Thanks for all of your responses.