I have a UniqueFire S7 that, until recently, worked fairly well (under-driven) with the factory driver, but apparently, it just died over the weekend.
There is hope! I tested each individual emitter last night and found that one of the XM-L emitters had died. I'll be proceeding with an emitter swapout and see if that gets the light back online. Unfortunately, this uses the thin 14mm boards, so I'll likely be reflowing an emitter so they are all at the same height.
This is a clone of the J18, with 7X XM-L emitters. It uses a 32mm driver though, with emitters connected in series. Are there any options other than the KD Beast with the stripped original driver as a contact plate? If the Beast can be made to fit, should I use the 7x model or the 9x model? I'm not planning on upgrading to XM-L2s on Noctigons at the current time, so what's best option?
I’d say HBFlex is still probably the best bet for that application, but note that it needs to be bonded (glued or thermal taped) to a flat surface to provide a proper a heat sink path. This can be challenging for flashlight applications where drivers are often pressed into a pill and only have edge contact with the pill.