+1 on the Nanosilk. I really enjoy tying with it. It’s a great product, super strong with very little bulk and I have never experienced a spool of it locking up like that. You can cord it up, flatten it out, tie split thread technique with it. It comes in various sizes (6/0, 12/0, 18/0) in lots of colors. I’ve been using a lot of 12/0 nanosilk in black, brown and olive lately but white also offers a lot of flexibility in that you can color it anything with a marker before finishing off the head. I always use a razor blade to cut nanosilk when I’m tying. It’s an extremely tough product and you could probably screw up a good pair of scissors pretty quickly trying to cut nanosilk with them.