I've done two now using Rhino3D. Draw the pannel outline, then I free hand drew the lines and then used the "fair" comand to smooth out the humps and dips. When I got the curves the way I wanted them, I then made a second drawing and tool all of the Red piced and lossly grouped them together, flollowed by the Black, etc I then printed this second drawing and cut it up like a set of plans and taped the pieces down on the monokote and cut them out with an Xacto knife, one that I sharpen after each piece, some times twice per piece. I use a white melinane finshed partical board for a cutting base.

The same process can be used in many of the drawing programs. I think it has more to do with your skill with the program that it's limits. Although more features is better.

One thing I found on my last project, was that design was done 2D, but when I got to the 3D world, thing didn't line up as well as I expected. When I do the next one, I'll make a 3D wing surface, lay out the design, then lay it out flat to print it. Hopefully, it will let things fit better.