Because I'm planning to install two GRT 8.4" EFIS, I'm needing to lower the screens to clear the longitudinal s upport structure in the back of the panel. This left no room for the Power Panel or the map box so I've decided to modify the map box making it 1 3/4" high and install it under the panel, as well as my power panel. The map box will be installed on the right side. The third image shows the power panel (mockup) installed under the panel.