First off Cathra your quit a guy . I am glad to see you finely straightened this miss out. I have been A small tube guy myself for ever when it comes to pc's . Many of us took endless flaming for our stance that small tubing was = to large tubing. As you illustrated so well each has its place and it does infact have everthing to do with components used in the entire loop.

Since so many listen to you I wish you would go over once more the differances between running 2 pumps in series vs. 2 pumps in parallel .

Parallel when talking about pumps is so much superior to series thats its almost laughable anyone who would argue the point of serial being superior in the world of pc usage. Needs to be straightened out also seems to me Cathra is the man for that job.