Source: Powerscore's November Crystal Ball Webinar
https://i.imgur.com/tWIcbyn.png
Also of note, the released form (of which there were several - IIRC 16 of them but don't quote me) of the May Flex ended up being a -9 curve, BUT there was at least some indication that the released scale might have been composed after the release... which kind of makes one wonder if a different method was used on the actual test.