John C, Thank you for the update on your 1931260 Challenger #3985. I am glad the sound came back on to indicate that there is life in the sound board.
Since it is back at Lionel, Dean and the technicians will be able to make sure all pick-up rollers are getting power. It should also give the design team a chance to see if a mounting plate with two rollers pointing to the rear of the tender is a possible solution, giving the tender three rollers total. It could get power from the current rear roller feed screw.
I hope this is a case where the customer feedback and Lionel make the product better. The new Big Boys can benefit from this solution finding process. Their tenders are similar.
Sincerely, John Rowlen