I find the SP10 Pro reflector has a pretty fuzzy overall profile, and is very forgiving of LED size… it works both domed and dedomed w 519a… both have pros and cons, larger round hotspot, or tighter throwyer hotspot…
but dedoming creates not only warmth, it pushes the Tint DUV down to about –0.0040, whereas the Domed 519a is much closer to the BBL…
the two photos above show the domed and dedomed beam profiles, as seen by my iPhone, which makes them look worse than in real life
here is the stock LH351d beam, for reference, it is no better, on camera
they all have sort of a secondary brighter transition, between hotspot and spill, and a shadow ring before an outer boundary ring…
but in real life, I think if you look at your stock beam, any LED you choose will be as good or better… our eyes are much more forgiving than the camera, in actual use, the SP10 Beam is not as varied across the spill as it looks in photos.
the SP10 Pro reflector is sort of short and wide… not particularly effective at focusing a hotspot… which makes it versatile, and compatible with both large domes or small…
The SC21 Pro has a Much better beam focus… recommended… for beam quality
I suggest you install a domed 519a, see for yourself, and then dedome it… to know first hand… bear in mind they drop about 20% in Kelvin Color when dedoming…
of the 517a Ive tried, the two standouts are the domed 5700K (super clean, not green daylight white), and the dedomed 4500K (makes a nice 3500K), but I recall you like neutral tint duv, so domed 519a may suit you best… it is similar to E21a…
here are my domed and dedomed 519a pairs:
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I get my 519a from azhu btw… or there is a telegram based group buy from Clemence…