Thank you all for the welcome, and for kind words and constructive feedback on the flies! It is much appreciated. I have made a RR implementing the changes that have been suggested; a slightly longer front hackle and shorter veiling - in addition I made the herl part of the body slightly longer and the floss part correspondingly shorter (about one turn of rib) - and it does indeed help the balance of the fly in my eyes.
Igor, I am intrigued to hear that you know of Erling Olsen and his flies. I don't know him in person, but have read several of his articles. He is a major source of inspiration. Actually, the idea of using the ringneck pheasant feather in this way I got from an article EO wrote on March Brown type flies, where he had used the feather this way to put some more life into large, featherwinged MBs!