starting this to coincide with my board project question.
I m using 2lb EPS as the blank, in a effort to test in a manner of sorts the difference in weights.
thinking I have 1 lb, was wrong, its 1.5 lb or 15/20kg m3. so TESTING 1.5 and 2.0 lb , desiity per cubic square foot.

materials are the bomb, 2 tuna cans, 1 cat food a large shipping tape roll wrapped in duct tape, 0.936kg.Dropped from 3.6meters.

EPS 2.75 cm thick.