Horge - Thank you for your response. I was hoping you would see this thread and offer your opinion.
I had seen your previous posts on the urchins and the "drunk" effect. I am currently using a small herd of Mespilia globulus in an attempt at control. I was thinking of adding some Diadema savignyi also to see if they would have any appetite for this stuff. I think I may try and locate some setosum also.
I will also try and put your idea of Herbivore-exclusion to work in my refugium. Perhaps another diverse influx of competing algae would be in order. More diversity would be welcome there regardless.