Very interested in headlamp… if an 18350 tube is an option.
(18350 in a triple—what’s the point you ask? Answer: mainly for regular use as low output with rare turbo bursts. Low weight means less bouncing with these light type right. But then there’s the option to then upgrade to 18650s in reserve if sustained high-output is needed. My use case is backpacking in dark places)
I have a feeling the FW4A will lose every advantage the FW3A has over the D4 other than tail-eswitch. The FW3A tried to do something different than the D4; it tried to be a useful EDC. To do this, it traded the extra heatsinking abilities and fourth LED from the D4 in favor of lightness and compactness. The FW4A will only gain a tiny bit of efficiency, but you’re never going to notice it. If the proposal was to beef up the head significantly it might be more interesting, but as it is the FW3A already can’t handle the heat it’s capable of.