First, the depth max should total no more than .800
Second, change the card load to Optimal no matter what.
A double carve may work, I've never tried one that way.
My attack would be to make the double carve your 2 sided MPC of the front, and just never turn the board. Both sides would be oriented exactly the same (which is different than lots of 2-sided carves).
Your back would be a different MPC.
I think we can now presume that you have adequate rails on this project.
Remember the Optimal setting, on a deep carve, in any case!
AskBud