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dangeek
Yes very cheap around £10-£15 at the time I think. I put links to the parts in the video description. It just involves a very small amount of soldering. The driver board is a little too large for the torch body, but it still screws together. I made the diffuser out of a white plastic baroca type tube. Just sanded off the label, cut it to size and sealed with a tiny bit of silicon sealant. The body takes an 18650 battery which lasts an age. I used it for the first time the other day after 2 years of non use for an hour and it still has charge.
Never found a good fitting for it so just tie it to a saddle bag now.