SSD, thanks.
already understood that I used wrong reflectors, but was offline. Don't mind I'll change them in my reactor? Though you still need to change two reflectors. As I guess efficiency will drop from 6 to 5 otherwise [5 = (6+4)/2].
And nice idea with a corner fan, I'm surprised that it's practically useless )
By the way, this model is somewhat out of classification: it doesn't excess heat, but can't work a whole cycle not loosing components (reflectors). And this is the main point for improvement (to place quads near each other - 4 reflectors per cycle, need to change after whole cycle)