I find that going very slowly helps. I also rotate the fly in the vise. For example, before I lash the hackle onto the post, I flip the fly down 90° so that it is vertical.
This morning, I worked on a size 16 Parachute Sulphur. I tied on the hackle with the fibers pointing upwards, so that the fly will sit low in the surface film:
Here is the materials list:
- Hook: Lightning Strike, DF1, size 16
- Tails: microfibbets, dark dun
- Body: turkey biot, PMD
- Post/wing: poly yarn, white; hackle, brown
- Thorax: Superfine dubbing, amber