ducksterman,
I used to always use a thread loop for my dubbing loops until I started watching the videos that Hans has been sharing. I really have learned a lot of new techniques since watching his videos and now I only use the "split thread" for my dubbing loops. I really like this technique and have since stopped using Uni thread since it is a "bear" to split. I use some Danville and a lot of UTC in 140 and 70. Here is a list of the threads that can be split fairly easily:
UTC in 70 and 140 Denier
Danville 6/0
Montana Fly Company Thread
Veevus
Beneecchi
For a needle to split the thread I use a sewing machine needle that my wife gave me. A sewing machine needle is made to split thread and not cut it. I took an extra Knit-Picker I had that I use to make the Shorb Loops on my furled leaders and pulled the metal part out and glued the sewing machine needle in the same hole that the knit-picker was in. Since the Knit-Picker comes with a plastic cap to protect it, I decided it would work good to protect the sewing machine needle.
I usually use UTC in either 70 or 140 for all my flies. I cannot answer the other half of your question on how to choose between heavier or thinner threads. Since I do not use or tie dry flies and only use Streamers, nymphs, buggers and soft hackle wets, the 70 and 140 denier works for me.
Last edited by WarrenP; 02-19-2013 at 12:24 AM.
Warren
Fly fishing and fly tying are two things that I do, and when I am doing them, they are the only 2 things I think about. They clear my mind.