Here's one for Bill.....

I took his advice (mostly)..... went out on the back deck this morning with just camera, lens and tripod. Did not bother with the multi-flashes but because it is so shady here I did use the 580EXII on camera with a better beamer just for "fill flash"

1DX
300mm f/2.8L IS USM I
ISO 3200
f/4.0
1/1000
580 EX II + Better Beamer at 1/32 power