Thanks, Lou! Much appreciated.
I also am intrigued of adding the LCRU to control the RS2 in the B-unit, since I figured it was once conventional. I know that controlling RS1 is hit or miss (even if you have the ERR sound converter), but if RS2 boards can be controlled without the converter, that opens up a few more options - the Santa Fe Mikado, Conrail SD60M, and Milwaukee Road SD40 from 1994 are a few candidates I can bring up that would do wonders with the addition of TMCC to control the RS2 in them.