FWIW, here's some pretty good information to consider.THICKNESS EFFECTS ON IMPACT RESPONSE OF COMPOSITE LAMINATESProceedings of the 13th Annual Technical Conference on Composite Materials
September 21-23, 1998 Baltimore, MarylandWarm RegardsShawn*****
"To see a World in a Grain of Sand
And a Heaven in a Wild Flower,
Hold Infinity in the palm of your hand
And Eternity in an hour."
-- Auguries of Innocence, William Blake, ca 1803