>> So, would roughing up the dome solve the problem?
No, i’m dont think so.
the problem is because of the x-cross in the LED (mtg2 dont have it) . it can be solved with OP reflector which have very large pils.or DIY mate dome on the LED .
I’m DIY roscher f16 whith OP reflector + xhp50. It’s also have “donut” in the hotspot, so i use TIR 25 optic with buble for this light.
foto Courui D01 + XHP50
http://forum.fonarevka.ru/album.php?albumid=1106&pictureid=15696
http://forum.fonarevka.ru/album.php?albumid=1106&pictureid=15695
C8, Supfire L3 will be the same