I found John Crook (http://www.crookscycleright.com/ccr/) on YouTube (of all places) when struggling with road bike fit. John has a series of videos which question some of the "rules" when positioning someone correctly on a bike. John was kind enough to go through his own process which is based on comfort and balance. Here are the links to the video's. I think his basic advise pertains to time trialists as well.
https://www.youtube.com/watch?v=QJ0MKuif36Q
https://www.youtube.com/watch?v=Zvy1AIkSCzA
https://www.youtube.com/watch?v=QJ0MKuif36Q
https://www.youtube.com/watch?v=uLSzMtQKdqk (very funny)
https://www.youtube.com/watch?v=lFQfuGibf0A
Enjoy! Contact me at ttpodcast@yahoo.com on twitter I am @markflorence11.