I revised the drawings again - this time I used autocad. Took me a while to learn, but I seem to have got the hang of it to make at least a basic 2D drawing.
I made a couple of different designs, with minor differences. A key point was to figure out if I should I was also deciding whether the guitar I the wings should be lighter with dark thin stripes in the neck through, or vice versa. My initial preference was the former, but once I saw pieces of walnut that were available I decided to go with walnut wings with thin maple stripes. I will post the pictures of the woods I selected separately.
I printed the model I liked the most to scale, placed it on two of my guitars (epiphone les paul standard plustop pro + Harley Benton strat kit guitar) to visualize the size of the guitar. I felt that it was a bit short and made the body and the headstock a little longer. The guitar would be approx. 39.5 - 40inch, depending on the headstock angle (I'm thinking of a 15 degree angle, using a scarf joint).
The one I decided to go with is the one in the separate image.
Any suggestions on the shape or design?