I'm a very opinionated person, so I (TRY) to refrain from commenting in a critical manner about Fly patterns. When I spotted the T.C.T.K. Fly, the Alarm went off in my head! "THAT looks like the Orphan of all fly patterns!"
But as usual I'm proved wrong by John's excellent, well written tutorial. John Scott cuts through the 'Visual' tendency I have, to the practical and the T.C.T.K. begins to look better and better! John's article is a great Lesson in retrieving a sample of the resident insect and copying it and taking it a step further and proving the Fly's worth. It's a productive formula! Find out what's in the river, tie a fly to copy it, use the fly as a dropper and examine the response. That formula produces success!
Thanks John!
Doug