Working on a recessed window family. The goal is to have the glass and the mullions inset 3 inches from the exterior face of the wall. I am able to inset the glass but I am unable to inset the front face of the mullions 3 inches without disjoining them from the reference plane, or moving a reference plane which shifts other elements of the family. Wondering if there are any tips to achieve this. See attached image [Mullions at exterior wall] - this is what it looks like now. For desired look, see [Recessed mullions]. Thank you in advance for any advice!