I recently acquired a Fenix TK75 (2015) and I have plans to mod it. I’m definitely putting dedomed XM-L2 U4 1As in it and was going to do a resistor mod but I’d like more output than a resistor mod will give me. I’ve read several different threads about different mods and it seems that the mods that output benefits the most from are those where the driver is replaced. The only driver that seems simple to put in place, simple for me any way, is this one. However, I do not possess the necessary equipment of skills to reflow smd chips to a driver. I’ve always purchased mine already built. I’d be more than happy to pay for the labor put into building it…as well as the parts of course.