When you know you made the head too big and appologize for it, it is a sign that you are becoming a very skilled tyer; otherwise you wouldn't care. Also, repeat after me, "I will never succomb to INTRUDER MADNESS".
I've seen Alec tie it with red body and orange dyed guinea hackle, it is a very nice fly with a lot of bulk (actually illusion of bulk).
And for those of you who don't feel up to tying Alec's ostrich herl chenile, you can use regular chenile in the same color with no change in effectiveness of the fly. As Alec says, "I wish my special ostrich herl rope was more effective than regular chenile; but it is not. I just like to tie it with the ostrich."