I know you already have the replace in all views feature.. but I have an avatar plush toy company, where when the customer adds a tshirt on the doll, the correspondent back image of the tshirt is automatically added on the back. When the person adds hair on the doll, the correspondent item is added on the back, and when the client chooses another one, it replaces in both views. This would be perfect for tshirt companies which creates specific designs that mach front and back of the product