Continue tying in yarn pieces until you reach the eyes. If you would like to install a weed guard you can do that now. With pliers, flatten one end for a more secure tie-in. Just behind the eye, tie in the weed guard and wrap around the mono so that it extends almost straight up. Cut the weed guard to extend just beyond the hook point.
Whip finish the fly.
Y ou have created something that will look nothing like the finished product. Similar to tying spun deer hair flies, we will now trim the fly to shape. Very carefully begin at the eye and trim backwards. I trim extremely small amounts at a time. We want the fly to end up looking like a teardrop or the shape of a Colorado Spinner blade.