Sometimes to define an anchor plane, I display the part deformation with a scale factor.
Then I look how the part is warped and choose a reference tacking it into account.
The problem is Moldflow does not attach the anchors to the deformed mesh but to the original.
So it is difficult to select the nodes you want.
And each time you try to change an anchor, you face the same trouble.
That is why I propose to do the contrary: attach the anchors to the deformed meshing.
Currently Moldflow attaches the anchors to the undeformed mesh: