Cutting out the rectangular openings for the switch and the DB25 connector was the real challenge here. The left side of the panel is dedicated to graphics - there is not much room behind it because of the power supply board. I left some empty space on the panel for the future installation of a small Accessory connector so I can connect different VNA accessories (like the RF-IV test head or Transverters). The power switch has a built-in LED connected to the regulated +12V line. The front panel's LED is connected to the +5V line (DDS power).