Aah, the D class. I bought one from RoS and it went to and fro from Australia and England, because Ros wouldn't take my word that there was a fault only apparent on DCC. In the end they must have re read my email/s and checked the tender wiring which was faulty. They sent me a new tender and the fault was gone, but I still had a Zimo MX658N18 decoder burnt out. I contacted Dapol and ended up getting half the cost of said decoder sent to me. Zimo repaired the decoder at my expense, so I now have one spare, that I'll probably use one day. Luckily for me, RoS paid all postage costs.