Hallo Maurizio,
talking of the radar antenna, pay attention to the lower window, in the Hasegawa kit and on the Sea King without the radar it has a different shape (as highlighted in red in the picture), it’s larger and specular to the right lower window. Instead, in the radar equipped helicopter, the window has a smoller shape in order to make room for the antenna support.
As I said before, amazing work.
cheers
Lorenzo
P.S. if you need information fell free to ask me, I have tons of picture and information about the Pelican.