here's what I found today... (image of data table below). I only have 48 data points, collected thusly:

- Forest Haven: Meathead's Deli
- all runs in 40 minutes (consecutively)
- create game, kill all zombies on the way to Meathead
- kill Meathead, record drop (only from Meathead), recreate game
- repeat
- 13:00 - 13:40 Central Time (USA)
- all runs with lvl 52 mage, no other toons involved
- 2 crafting drops (1/24 or around 4%)