I doubt that emitter is mounted on DTP (it would say so if it were). It’d make a big difference, plus it’s probably around 70-75 CRI
Sanding down the board you can just use a file or sandpaper and run the board through all the way around or use a rotary sanding tool. For the high cri Cree emitters like new Zebralights, I don’t think it’s available yet unless you want a 8 week lead time and can spare enough for 500 emitters. This is as close as I can find: XPLBWT-00-0000-000UU640H Cree LED | Mouser
4000k 90+ CRI 2 steps macAdam ellipse
Go for that if you can reflow it since it’ll be brighter than the Nichia 219c. You can also wait until Clemence has the 219c 5000k available if you want more neutral tint. [GB ended,discussion only] CRI > 80+ NICHIA 2000K-6500K [E21A/219B/219C/319A/144A/757GT-F1(Optisolis)]