Jason

Here is my method (YMMV).

Tie one end of the extended body material to the hook. take the other end and twist it fairly tight. Hold the body material in your left hand and grab your bodkin. Place the bodkin on the body material at the length you want the body. Bring the body material towards the front of the hook around the bodkin. The body should furl and end at the bodkin. Tie the other end to the hook and continue on with the fly. It is easier to do than it is to write.

Brad