Becoming more mobile with the D2X/200-400 on monopod (PICS)

I think I can do this. That is, walk a fair distance with this D2X + 200-400vr on a monopod/Wimberley Sidekick rig. Did a couple "laps" around the homestead this afternoon, and while I'm still searching for the most comfortable way to carry it over my shoulder, the weight's not too bad. It does kind'a dig into my shoulder a bit with the lens facing backwards. How does everyone else do when they carry a rig like this?
A couple test shots:

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Focal Length 290 mm
Exposure Time 1/640 sec
Aperture f/5
ISO Equivalent 400
Exposure Bias
White Balance (-1)
Metering Mode matrix

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Focal Length 350 mm
Exposure Time 1/1000 sec
Aperture f/5.6
ISO Equivalent 400
Exposure Bias
White Balance (-1)
Metering Mode matrix (5)
JPEG Quality (6)
Exposure Program aperture priority

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Focal Length 400 mm
Exposure Time 1/4000 sec
Aperture f/4.5
ISO Equivalent 800
Exposure Bias
White Balance (-1)
Metering Mode matrix (5)
JPEG Quality (6)
Exposure Program aperture priority