I will evaluate the relative mechanical strengths of the two windows I've created so far by dropping a 28.15g steel ball onto them from increasing heights and studying the results. After each drop I will inspect the window for damage. If I find any, I will circle it with a permanent marker to ensure I don't confuse earlier damage with later drops.

For the first window I filled in the paperwork by watching the video. I was more diligent at accurately filling in the results for window 2 during the tests.

Final adjusted results.