I had blink Bonny away to Hornby for second time. Got it back with same reason as above, NEW CHASSIS ASSEMBLY FITTED UNDER WARRANTY, don't know why, they know more than Me for sure, but would have helped to understand the underlying reason. When My locos are out of warranty in the not too distant future, it may become an expensive issue, so I truly hope that the quality control / design pre release is improved upon. Am sure they can focus on the issues people have had and use it for continuous improvement. Looking forward to 3 more locos on order first half 2024. Do not wish this to be seen negatively, because customer service truly have really been A1, if You pardon the pun.