Larry, I didn't want to clutter up your build thread so I posted here.
I'm no expert, but: The "Histogram" of your photos (light levels from darkest to lightest) are pretty off. Ideally, the light distribution should be somewhat spread out across the range, from one end to the other. Yours is bunched up in a narrow band in the middle. I really think your problem is more due to your camera or camera settings than you lighting. Or both. I fixed it a little, but it's hard when it's that far off.