>> tests at the 15,000 G level, and resonators have only slightly better > ^^^^^^^^^^^^^^^^ > Man, how did you get this????????? It is not very hard to get. Throwing a concrete slab or steel plate onto another from a certain height is a good start. Peter -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics