Scratch the "open for another couple of hours", that's DRIS, where I bought the light from, which I will try again when open. I tried contacting DR directly, seems they're in FL but just got their answering service so I'm guessing not open at the weekend. I've sent them a message and will follow up on Monday with them.
Knowing I'm leaving next Sat. what are my options, does anyone have replacement tail cap assemblies? Can the tail cap be taken apart and fixed? If I need a replacement torch (flashlight) for rec diving (no canisters), what's the best replacement for a CX1 that isn't a CX2?