There’s a good one for XIr1 on the BO support site. Of course, as FC users it doesn’t address your needs directly, but it does give a very good picture of the new XI architecture’s needs.
And here’s a sizing thread from last month thta has the link to that sizing doc: https://bobj-board.org/t/39809
Cris E 
(BOB member since 2005-03-18)