Good to hear from someone with the 5700K, so thanks.
We don’t know the specs or configuration on the FT03 70.2, but it doesn’t have the mass to sustain high output from that emitter and only has one cell. The driver is a mystery. Though bulkier, the SP70 has a more suitable head, can be had for ~$50 with a code (I’ve read), and will be more powerful than the FT03 70.2.
I guarantee that the Sofirn body is thicker and nicer than the Astrolux and has smooth, square threads to boot. The FT03 will be smaller and lighter, of course. I have the SST40 version and love it, but it feels every bit a budget light. The FT03 will fit in a (large) coat pocket and suits my needs very well (I need to penetrate mist/fog), but I was jealous once I saw the SP70 beamshots.
Also, there’s a BLF SP70 in the works, so…
I don’t hate the 70.2, but it’s a very large surface for a relatively small-headed thrower.