Your SBS is great ... just have a question ...
How does the tying thread get from (see Blue type);
3) Wind the thread 1/3rd of the distance back towards the bend of the hook, then wind it forward to the tye in point. (This will build up two layers of silk thread under the front 1/3rd of the body which will later help form the taper of the body).
to (see green type);
4) Tye in three or four strands of pheasant tail fibers. (The length of the tail is measured to be equal to the full length of the hook. The tail extends from the end of the straight part of the hook shank.) Wrap the silk from the tye in point, back to the bend of the hook and forward to the tye in point. Leave the butt ends of the pheasant tail fibers hanging out over the eye of the hook. They are folded over the back of the fly in a later step.
I know ya wraped it back to the tye-in point ..... but ??? in touchin' turns or quick an few turns.
Just figured I'd bust yer chops a wee bit.

hank