I too am looking for steps, processes, or soldering to convert a Rio Grande SD-40T-2 that has conventional control to wonder what to replace the 691-DREU-A motherboard? with that would give me the control of TMCC via command control. There are 2 DC motors, with F & B lights, electrocouplers, & diesel sounds via a sound pcb with the tag "AD1". Sound would be nice, but not neccessary.
What does ERR offer that will adapt to make this engine operate in command control?
Thank you for your wisdom
