I have solved the biggest issue with the SP33v3 for me, the cursed ring of pee, with some diffusion film (#4A from DC-Fix Diffusion Film Sale for smoothest beam profile which is my preference, or #2C for more hotspot/throw).
Without that ugly corona, and with drastically reduced tint shift, this flashlight’s brightness is now useful without distractions. Really happy with the result and this flashlight!