I was going to defer to you on this one. You are like the beam connoisseur after all. DUV/output changes aside what do you think has the cleanest beam? I suspect it will be a short range light so whatever has the least rings/artifacts I suppose.
https://gist.github.com/TimMcMahon/22d7a3895988b627187bde3cf344d126?permalink_comment_id=4222618#gistcomment-4222618
anduril_ubuntu_instructions.md
Ubuntu 18.04
> These are personal notes for flashing an Emisar D4V2 Ti with a KR4 nofet driver using E21A emitters.
> anduril.noctigon-kr4-nofet.hex will be used.
>
> Caution:
> 1. You could brick your D4V2 if the pogo pin adapter from intl-outdoors isn't aligned properly. I bricked my D4V2 Sand.
> 2. Don't install the wrong firmware (e.g. anduril.emisar-d4v2.hex on a D4V2 Ti with a KR4 nofet driver) or you may destroy the emitters.
1. Install avrdude and other required stuff
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