Mitch;
Any luck finding your board??? I am in the process of updating my train inventory and find that I have a 16655 (O and O27 Gauge Tender 2671-W with Steam Railsounds) buried in my basement. I have no idea what board is in it, but I know I’m never going to run it again (it’s been packed away for 20+ years... not even sure how to test it). I am currently helping my brother after spinal fusion surgery, so I won’t make it back home for a couple of days till next week, and then it may take a few days to send it off if it will help with your latest Frankenstein project!!!
Let me know.