Bottom line is that I messed up on a design. I designed two new 480/277V, 3ph, 4W panels to two seperate existing 480V, 3ph, 3w distribution panels. See attached one line diagram for reference. What would be the best way to correct this mistake? The 480/277V, 3 ph, 4W panels are already installed and the feeders have been pulled. The electrical contractor just brought this to my attention. Thank you.