Hi Alessandro,
You have a very interesting project! Don’t forget to consider the user’s application in your various selections. A hobbyist may have different goals than a professional or a user with a specific application. Compromises in VTOL designs (budget, location, weather, application) may not always be apparent. In other words, one size doesn’t fit all.
I opened a new Mini Talon Conversion thread here on the VTOL Plane forum so that we can continue on a more appropriate forum. Hope to see you there!