Sorry for the delay in answering your kind comments and encouragements.
In those days I was sick and now I'm just taking a bit normal activity.
This pause allowed me to reflect on the project and I decided a more gradual approach. So I started to draw the GE TF-39 (with a drawing I realize all four engines in one go! )
For now I set the scale of the project at 1 / 144. In this way the model should be about 0.50 meters long (near 21 inches), with a wingspan of 0.47 m (near 19 inches).
I think that the 1 / 72 scale, that Cybermac porposed, is very challenging for me: from the engineering point of view (large size involves the design of a structure that would ensure the proper stiffness and dimensional accuracy). On the side of detailing, big model involves bigger accurancy in detailing, more documentation, etc.
I have to resolve a lot of problems in rendering the complex shapes of the Fat Albert, so i think that a more humble attitude would be preferable.
A special thanks to Ashrunner for the first hand tale about the impressive dimension and the difficulties to feed the giant.
For now here attached the first version of the TF-39 1C.
I think that this will be a long ... long-term project.
Best regards, Nando