It's hard to say. I suggest you rerun the tests and follow the setup guidelines a bit more closely to improve your results. Your light levels are below the 8ev minimum recommended. I typically calibrate with light in the 10ev to 11ev range. Your target isn't level in the tests either - it helps to level both the target and camera. Your target distances are also outside the recommended ranges. Suggested distance for calibration is 50x focal length, or in a range from 25x-50x. You are a bit long on the 24mm side - 1.6m vs 0.6m - 1.2m recommended and short on 105mm side - 2.0m vs 2.6m to 5.2m recommended. I also find that target print quality can greatly affect the results. I've tried a few different papers and ink settings to get the highest contrast targets.
Using the recommended setup I achieve excellent result confidence with both a new 6D and refurb 6D on the 24-105L and several other lenses. The results are pretty consistent on both bodies, within 1 AFMA at both 24mm (1,2) and 105mm (0,1). I also verify the autofocus with a LensAlign tool that I got before FoCal.
Ive basically done the best that i could with the usb length that i have. its not that long at all. That would be quite a bit of light to hit ev10- and im in a white walled room with windows to the right of the target setup- how did you manage to achieve that level of light? (at night i blast the target with a small flashlight).
It was pretty disheartening to look at the raws from a demo 6d and find the images were immediately noticeably better.
Im takign it around the block to see what i get form some real world sceneariosn