Nichia 519A emitters are all the rage right now in the torch enthusiasts community. Here is a quick tutorial on how to swap a 519A sm353 domed emitter into a Sofirn SP10 Pro.
Sillen reached out to see if I could repair his Lumintop FWAA Copper torch. He had accidentally sliced the domes off two of the three LEDs while installing a glow gasket.