I did a little searching on the internet and came across these journal article references that may or may not be helpful (I have naver taken any CST course-work, so I am limited:
References
1. Retzlaff E.W., et al, Nerve Fibers And Endings In Cranial Sutures Research Report, Journal of the American Osteopathic Association, 77:474-5, 1978.
2. Retzlaff E.W., et al, Possible Functional Significance Of Cranial Bone Sutures, report, 88th Session American Association of Anatomists, 1975.
3. Retzlaff E.W., et al, Structure Of Cranial Bone Sutures, research report, Journal of the American Osteopathic Association, 75:607-8, February 1976.
4. Retzlaff E.W., et al, Sutural Collagenous And Their Innervation In Saimiri Sciurus, Anat. Rec., 187:692, April 1977.
5. Retzlaff E.W., Mitchell FL Jr., The Cranium and its Sutures, Germany: Springer-Verlag Berlin Heidelberg, 1987.
6. Upledger, John E., The Reproducibility Of CranioSacral Examination Findings: A Statistical Analysis, Journal of the American Osteopathic Association, 76:890-9, 1977.
7. Upledger, John E., Relationship Of CranioSacral Examination Findings In Grade School Children With Developmental Problems, Journal of the American Osteopathic Association, 77:760-76, 1978.
8. Upledger, John E., Mechano-Electric Patterns During CranioSacral Osteopathic Diagnosis And Treatment, Journal of the American Osteopathic Association, 1979.
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In the book The Myofascial Release Manual, Fourth Edition / Carol J. Manheim MS, MEd, PT, LPC / $73.95 / ISBN 10 1-55642-835-9 / ISBN 13 978-1-55642-835-7 / 312 pp Hard Cover / Pub. Date: 2008
it looks like there is some information on Dural Tube Dysfunction:
Testing for Dural Tube Dysfunction
Criteria for Performing a Dural Tube Release
Dural Tube Anatomy Metaphor
Dural Tube Release
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I believe what JLWmassage is referring to as a kink, would be better rendered as a "restriction" or "tension".
I don't know much about Cranio-Sacral work, but I found a few other articles:
Upledger Institute wrote:"When was CranioSacral Therapy developed?
It was in 1970, during a neck surgery in which he was assisting, that osteopathic physician John E. Upledger first observed the rhythmic movement of what would soon be identified as the craniosacral system. None of his colleagues nor any of the medical texts at the time could explain this discovery, however.
His curiosity piqued, Dr. Upledger began searching for the answer. He started with the research of Dr. William Sutherland, the father of cranial osteopathy. For some 20 years beginning in the early 1900s, Sutherland had explored the concept that the bones of the skull were structured to allow for movement. For decades after, this theory remained at odds with the beliefs of the scientific and medical communities. Dr. Upledger believed, however, that if Sutherland’s theory of cranial movement was in fact true, this would help explain, and make feasible, the existence of the rhythm he had encountered in surgery.
It was at this point that Dr. Upledger set out to scientifically confirm the existence of cranial bone motion. From 1975 to 1983 he served as clinical researcher and Professor of Biomechanics at Michigan State University, where he supervised a team of anatomists, physiologists, biophysicists and bioengineers in research and testing. The results not only confirmed Sutherland’s theory, but led to clarification of the mechanisms behind this motion — the craniosacral system. Dr. Upledger’s continued work in the field ultimately resulted in his development of CranioSacral Therapy."
She got a spinal leak from it and then the DR. did a blood patch wrong the first time and got blod in the spinal fluid, so they had to do it again. 
