Team Free Will Fic Beta?

Anyone feel like beta-ing a Team Free Will mini-bang story that I wrote? It's going to be posted sometime after December 4th.
It is an AU take on the beginning of S10, It's  14k, R, Pairings are: Wincest, Cas/Meg, although only the Wincest is specific.

The Summary is as follows: Set in an alternative beginning to Season 10, Sam and Cas struggle with convincing DemonDean to give up the Mark, the solution involves a trip to Hell to perform a mitzvah, a ceremony in a circle of holy fire and the Men Of Letters demon cure. In the end, they’ll all be changed in completely unexpected ways.

Thanks for any and all help!