Thanks for all your comments.!!!
I changed some things from the model since there are nor schematics. For example, in some pictures it seems that all 3 wings are the same proportions, but in my model I made the top one smaller because it looked ugly, and I have to made up a lot of things. (like the 3 engines at the back or the "nose" section)
Overall, I think it looks very "Insectoid" in spite of not being canon.
I'll post an update asap.
Mariano