Last small issue, the receiver being behind the battery, and not accessible, I had to make an extension lead for the ESC to be able to unplug it easily and connect it on the USB cable to program it or to use the built-in logger. Finally, I used 2 antenna exits to install the 2.4Ghz antennas in the best position.
The plane is well balance without any lead (yeeessssss !) and the weight is just 2.5 kg, which is better than expected initially.
The Rotmilan is ready to fly now, waiting for better weather condition. Here are the pictures taken during the assembly.