Tom - John Reid from Terrorhurtz has a good pneumatics how to on his website. Again its aimed at heavyweights but could be of some use.

http://www.johnhmreid.dsl.pipex.com/killerhurtz/howto/pneumatics.htmhttp://www.johnhmreid.dsl.pipex.com/...pneumatics.htm

Ed
http://www.teamstorm.comhttp://www.teamstorm.com