Hi, I have just bought a C-Bus 6 gang switch from someone in Perth on Ebay, and the Toolkit says it has no serial number and must be returned to the place of purchase for repair. Have I been ripped off, or is there a way to fix this? I see that someone posted the same question here 10 years ago, and there was a hint that there may be a solution as they took the conversation offline. Cheers Rob