So I ended up doing an About Face - I cancelled my order with 4000K and re-ordered with 5700K!
I found a thread here (recently resurrected) on the single emitter Jax E2 Nichia Jaxman E2 measurements (Nichia 219B, bargain high CRI 18650) That light at the time had 219B not 219C but none the less after reading it and all the replies I decided to change direction. I admit I got afraid of too much yellowish hue, I’m not a fan of flashlights that are near to replicating incandescent light.
Also read the feedback on aliexpress. Interesting all 44 buyers who left feedback bought the 4000K, many said it was quite yellow and someone even mentioned incandescent, but no one was complaining - they all said the tint was great, mostly because of the excellent color rendition. It appears no one bought the 5700K, (at least no one who added feedback) Maybe they were afraid it would be too cold? I’ve previously held off on buying anything with Nichia 219 fearing a pinkish hue. And since Maukka’s test shows warmer doesn’t mean higher CRI, my hope is I’ll see this same awesome high CRI color rendition, in a pure white beam that I prefer.
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So it took some time, a lot of research plus the many helpful replies here, but I’m happy with my decision, maybe I’ll try the 4000K later. After I get the light and use it awhile I’ll return here and post about it, and probably do a quick review too.