I did a little sailplane flying when I was a teenager, but had to stop so I could save money for college. Loved it, though.
The scale in the CAB site map shows the impact was about 4100 feet off the runway axis, and the CAB report says it was 3800 feet off the runway. So I'll run some more numbers through my spreadsheet. It looks like the bank can never be higher than about 42 degrees to hit that window.