Absolutely amazing Doug!!
By the way, I can't remember whether you said you had the IS or non-IS 70-200mm lens but there is an excellent lens test site
www.photozone.de that does professional tests of most lenses.
The results for the IS version are here
http://www.photozone.de/canon-eos/19...review?start=1
and gives the centre resolution, edge resolution and chromatic aberration figuresfor the lens at different focal lengths and apertures. At 200mm it looks like f/5.6 is the way to go.
Cheers,
Steve