I have a 3rd Rail steamer that, if possible, I'd like to upgrade with the single board RailSounds Commander (see below) in place of the stock RS4 audio/power boards. This engine is about 9 years old and has what is labelled a Cruise Commander v. 4.5 with a chip on the board also labelled "CR-7.0" and copyright ERR. The radio board is a 691-R2LC-C.
I have used this current version of the RS Commander before but only to put sound in a diesel dummy unit:
What I would like to know is whether this board will work with the Cruise Commander version I have? In other words, is this a straightforward upgrade or am I really forced to change to a newer version of the Cruise Commander as well?