Thank you Patrick,
now i'm not working as aeronautical engineer, i am a free lance private worker. Being a structural engineer my job of now is about general civil structures, like buildings. In the past, I worked with a company engaged in maintenance of airplane engines, but I did not like the job much so I decided to do the freelance.
About my models, I prefer above all IIWW planes, but I do not even have problems building modern models.