It looks fantastic stoneyhomer and it is normal for yellowing in the later part of its life. That first pic shows nice dense looking buds and she looks rather mature. Have you checked the tric's? The flush was a good thing but it can cause yellowing to start as well as progress. Usually about three weeks out i begin to flush out my soil with just water and this is what my plants begin to do. So if you flushed her she may have progressed into eating her reserves. Completely natural at this point for the plant to do this, its metabolizing its self. All those sugars stored in the fans and other leaves are being used to sweeten, grow, and mature your flowers/buds.
At the color she is now i could see her taking about another 3-4 weeks to go fully yellow. By this time your plant will most likely be finished and ready to harvest. If you want her to stop yellowing from this point till the end you can by feeding her a bit. But if it were me at this point i would be letting her yellow out. She'll taste so much better, and the burn will be clean, low ash.
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