Quote Originally Posted by AlanB View Post
This is a technique I first came across in the 90's in a Fly Fishing and Fly Tying article by Davie Wotton.
Indeed - 1994. The first 'formal' reference I have found on this technique. I remain amazed how recent this technique appears to be.

I would welcome literature (books or magazine articles) on the technique pre-dating 1994.

There is an additional tip if you find it difficult to split fine threads. Place your index finger behind the thread pointing toward you and run your finger nail up and down the thread. This will cause the thread to spread and give you a bigger target area to aim at with your needle.
Which is exactly what I do on the video.

You'll notice if you watch carefully that Hans is using a bodkin made from a sewing machine needle (it looks like a Petitjean one to me). Sewing machine needles are designed to go through threads without damaging them. They make the best tool for this job, and it is easy, and inexpensive, to make your own.
Not quite, Alan - it is in fact a C+F dubbing needle - but indeed, sewing machine needles are also very suitable.