For our helicopter platform (Gaui GX9), we have recently been adding in the various avionics – camera, radios, flight controller and so on. This also included the time-consuming (but very important) task of routing the cabling.
We even put a small camera on the tail boom so have in-flight footage of the helicopter:
We have still got a few final items to add – extra fuel tanks for the long duration flights and better placement of the radio antennas. But we are getting very close to our final platform.