As one of the other posters asked about some actual fishing techniques
with these and other flies, this may be of some help;

http://www.mike-connor.homepage.t-on...s/set_ups.html

http://www.mike-connor.homepage.t-on...s/tactics.html

Of course there are a very large number of possible presentation
techniques, and they also depend on how the flies are dressed, and to
what specific end.

TL
MC