Chasm,
I am by no means advocating this as the best way, or the only right way. Trust me I've been in groups(10 yrs and 40lbs ago) that would routinely do 4.5 hour centuries. I'm just saying for the group we have and the experience level we have, this happens to be the right way for right now. As things progress I'm sure we'll modify and fall more in line with what some of the other groups do.