Update:
learned that with a BCR, it should sit for a minute to charge. Did so and was scolded by the crew to “get going!” which was pretty cool. After watching it go through some switches, it appears the rear roller is not picking up. I will replace it and see what happens. I noticed in my MTH SW1500, which is newer production, has 4 middle rail rollers! A Bi-polar should have something like 10. 😁