Part of it may be that your file is warping, and this is mostly a product of it being a huge print. The things that have the most warping potential are tube-type shells. That wasn't a good description, so I'll give an example.
The other day I printed what was basically a rectangle 160mm by 40mm without a top. The walls were .063" thick. even with a 3mm brim, it warped like hell. So I ultimately added some beams between the two vertical walls, went for a 6mm brim, and went to .1" walls.
Another cause of layer separation that I've seen, besides warping stress, is that some of my filament is kinda crappy and needs an extra high temp. ABS gets the best layer connection at 240celsius, (210celsius in solidoodle world - our temps are actually higher than our sensor reads) , but that's above the temp rating of the nozzle. I would not go about layer one temp 205celsius and 203celsius for the rest of the voyage.
When I get back to school, I plan on heating my print area so I can run at 60 celsius ambient temperature. I'm still trying to work out the best way to do that without killing the stepper motors (So far I notice with 30 celsius ambient in the printer, my motors are at 50c. At 60 celsius ambient they will be about 80c, which is ok, but I wouldn't be comfortable with anything about 90c.) I am not sure how much having such a higher ambient temp will help, but I hope it will reduce layer separation.
None of my three points seem super applicable to your situation (you use decently high temp, I've not tested ambient yet, and the yoda is not the worst-case for warping. It's just huge.) So uhm,,, I wish I could give a definitive answer. I'd like to see what others have to say 
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