Today marked a step forwards, and two steps back, with Princess Anne. Took her down to Ruddington to test run during a quiet spell. It ran reasonably well, dragging its tender. So off came the wheels; on went some oil; it ran better. Gave it a loaded set of ironstone wagons (15). Not happy at all at this.
Took her back to my parents to test on a set of Comet LMS coaches (4, then 5). Results as expected. I need to ballast up the loco to the same amount of weight as my dad's LMS 6225, and my own LMS 5511. You learn something new everyday; or in this case, confirm what I already suspected to be the case.