That is a great looking Dee :smokin:
Sleek profile , dressed thin and sparse like a Dee ought to be ... great job !!
About the wings , you dressed the wings as Mr. Brown would have . Mr. Brown was one of the forefathers of the Dee style along with Garden and Mr. Wade .
Dee wings should be thin and long , extending to at least the bend of the hook , if proportions were to follow tradition . I see you have dressed this fly in a low-water type style though , which is fine and nothing wrong with that . It will aid with sinking the fly . Typically when dressing a Dee for low-water , we just dress down the body , make it ultra thin and sparse , tightly wrapped and not picked out . Ensure to strip one side of the body hackle and a single turn for the collar . The wings are tied in the same fashion as it would be for a regular dressing .
Back to the wings . Many tyers like to use too many fibers for each of the wing slips , I was guilty of that too . Wide wing slips can make for a pretty wing when mastered . It gives that nice bulk up front , leading to a thin strip over top , adding to the sleekness of the fly . But when fishing this fly you will notice the Dee wing appeal is gone . It will lack movement in the scissor-like effect that the Dee is known and created for . Wide wing slips have a tendency to split before their time , sometimes only lasting a swing or two . Not that split wings matter to the fish , but it can effect the way you fish the fly because of your confidence level . Also , the added bulk up front from the wide wing slips can cause the fly to ride up side down or spin in the current , just like over hackling a fly or too much collar material . Looks like you did your homework and made sure the butts of the slips do not cross , right on !! Over-lapping the butts will also cause the fly to skue , turn up side down , spin in the current and split the wing slips ... good job !!
Thin wing slips will have a ton of movement , scissor-like pulsing back and forth and wiggling up and down on the swing . This is the reason for a thinly dressed body , sparse body hackle and light collar , to allow movement of the wings . Too much hackle and a thick body will impede the wings from moving like they should .
I like the colours that you have chosen to dress this Dee ... looks like steelhead candy :smokin: