I only noticed this after one of the model railway YouTubers drew my attention to it. I had to use a magnifying glass to spot it with my eyesight. That said it does bug me a bit. It is a shame for an otherwise very good model. I suppose that's the downside when buying first editions of newly released models. You take the chance of getting the teething troubles before they are rectified on later batches of models. It will be interesting to see if the fault is on the sister A4s in the range which are now in stock in the Hornby warehouse. I am frustrated by this and the apparent problems in the setrack curves, not only for myself and the fact that I plan to invest in TT and build a new layout but I also feel a bit for Hornby who are obviously taking a gamble by introducing this new range. I really hope these problems can be resolved and that TT 120 for Hornby will be a success.