Eldee, thanks for the compliment. The only significant variables remaining are the SSP numbers early on, class size, and whether Compass holds for a full 90 days or 60 like is shown.
As for SSP numbers, I don't think the data early on is very accurate. I believe they were interviewing SSP exclusively every other week, but I haven't been able to nail down their numbers. If anyone has SSP numbers that would be a great help as you basically need your own column separate from street hires.