I agree with Hal Nail. I had a Dapol 14xx, with sound, in my hands for a few minutes before it was sent back due to damage in the post. Hattons offered to order a replacement as no more were in stock, but it was several months before they realised they could not get one and cancelled the order refunding my money. I never did get a 14xx, hopefully there may be a rerun. In my lifetime?
I also have a 122 with poor running and noisy motor or gears. I contacted Hattons within a couple of days but they were sold out. The only option they offered was a refund. I did not want to loose out again so I said I would consider it and hope it might improve with running, no such luck. After reading this thread I realised other people had the same problem and were trying to get them repaired by Dapol via DCC Supplies. I am still waiting for a reply from Dapol to see if it is possible.