I only have experience with dry fly capes from Metz and Whiting, but was considering purchasing some from Collins Hackle Farm. They sell commercial, grades 1, 2, and 3. I am interested in tying flies in sizes 12 - 18. For those who have purchased from them, what are the fly size ranges and "sweet spot" in ranges in what they offer? In addition, comments about their overall quality would be appreciated.