One of the best ways to become a better Rigger/Coach is to read. Reading exposes you to different ideas, various ways to do things, and alternate solutions to problems.
And with that in mind I want to refer you to what I consider a GREAT Web site—a worthwhile place to spend time reading, and hence, to improve your rigging.
The title of the site is: FAQ: Physics of Rowing; and it is located at http://www.atm.ox.ac.uk/rowing/physics.html.
The site is produced by Dr. Anu Dudhia. Anu works at the Department of Atmospheric Physics at Oxford University in England. I’ve written to him several times, and although I have not met him, he seems like a very nice and thoughtful person.
His site has a wealth of information about rigging and the physics of rowing. I use it quite often as a resource for my articles, books, and rigging.
The two sections that I’ve found very helpful are #7 (Levers) and #8 (Gearing). They may be a tad dry sometimes (reminded me of Mrs. Gattlingun’s Physics 101 class); however, the information is great.
Try it out, and let me know what you think.