Loads of ways of doing the winging , the rolling around method is not one I like .
I use paired slips from a left and right feather , lay them on top of each other ,offer them up to the fly and hold in place with the feather on top and going slightly round the sides then pinch'loop . Do 2 turns just to hold and then you can manipulate the fibers to where you want them and then tie down tight , trim and finish .
You will get used to how wide the slips are you use , all depends on how "cloaked" you want ya Dabbler ..
Here is a couple using the above method .....
You will see the different amounts of winging , as I said , up to you how much you use and how far around the fly you take the wing/cloak .
I don't like much Mallard under my fly and I feel it hides the body to much when viewed from below ( trouts eye view ) if it is over done .
Hope that helps