Tying in Tails part 1
One of the hallmarks of good production tying is neatly dressed imitations. If the body is to be made from thin materials (such as tinsel) then the tailing materials are extended under the full length of the body (Figure 1). When the body material is wound over the tailing material, it will form a body that is uniform in diameter from one end to the other, very neat, indeed.
Figure 1. To achieve a uniform underbody, tie in the tailing material fully forward to the head of the fly.