My experience with the hattons 66 hasn't been great either. I bought 4 of these locos originally. I had issues with two of them and had to return for replacements with various issues from detail damage loose parts and wobbling bogies. One of the locos had clearly been previously used as it very dirty wheels and no dcc blacking plug inside and the wires had been messed around with. Hattons replaced them with no hesitation so that was all fine. I have since purchased another loco and it too appears used. The wheels again have dirt on them and one bogie wobbles so badly it derails. I will be returning this for a replacement too. I am disappointed by the hit and miss of the quality of the locos, but hattons service has been good and at least they are replacing faulty locos. One can only imagine the amount of faulty locos they must now have.