Your posting of changing the LED in your Sunwayman V10r Ti was terrific! I have three and was able to open one to unseize and regrease the rotating bezel. I prefer the warmer 3000 color so I am off to find my soldering equipment. It looks like mountain for the circuit board and Hawaii for the Nichia 519a. It seems a lot of variation on the Nichia numbers and the 3000s seem hard to find?