Try using well used battery's especially rechargeable in the faster trains and new alkaline, not rechargeable in the slower trains. When I do onboard filming for videos I put in a used rechargeable in the filming engine (C size for weight) and I drop weights and another c size battery in a gondola to slow her down even more while filming.
![[Image: 7071.gif]](https://www.allsmileys.com/files/sweetim-texticons/7071.gif)