The CDC Captive Dun BWO is a great emerger option early in the hatch phase when fish are tailing and just beginning to target insects reaching the surface.
This particular pattern is effective early in the hatch phase. As nymphs move through the water column towards the surface you'll notice trout becoming more active. You may see sub-surface activity, boiling or tailing. This is where this pattern shines. It can be fished on it's own, as a trailer pattern, or slightly submerged. The CDC "bubble" will trap air and mimic a natural mayfly as it's emerging.
Every tier has preferences when it comes to the bench. I try to tie as simply and efficiently as possible. These are some of the must-have tools I use to design our unique guide patterns:
Set yourself up for success when fishing these styles of patterns. When fishing technical waters, I find that having the right tools is necessary and makes for a better overall experience.