if its cooling fine at sound levels you are happy with then sweet.There really is no need for better cooling, it will maintain its max all core boost clock indefinitely under an all core load (CB r20) and is still about 20-30C off from thermal throttling. Maybe the backplate good be tidied up a little, but I feel the current mesh one does a good job of ventilation, plus you don't really see it anyway. Unless you didn't see the update in post #5 with the shroud and backplate in place.
and no i must have missed the backplate pics.
good work