This fly would have fish all over it, I love it. For some reason I've always had a real soft spot for a fly with claret in it, claret that slinks down and has movement, even better...
When I first saw this pattern I immediately thought about your comment on Emyr's Welsh flies and the ones you liked best. I reckon this pattern would look really cool with the same oversized cloak and dabbler style hackle, shrouding/veiling the body a bit. Some bronze mallard or some natural mallard flank would do the trick. If you know how to tie this style of wing/collar, I'd love to see it.

Let me know if you don't, I learnt how to do it from an Irish guy and will try to put up a step by step if you like? Btw please don't take this suggestion as a criticism of your fly, I think the fly is fine just the way it is. I just thought following your comment on my post, that your claret killer would easily convert/translate into a cool dabbler of your own.
Karsten