This is an Extension of EternalDarkness' Fuselage Slicing Wing Technique Guide.

Unlike in EternalDarkness' guide where the wing tip of the wing is on a fixed size as the wing root. This one features a difference in size on the root and tip of the wings, much like what aircraft wings are done.

This intruction is already in the Craft Constructions, but ill leave it here aswell.

I recommend examining the Blue one first as its alot easier to understand the method.

Color Code:

Blue: 100 : 50(+0%) by 50(-0%)
Orange: 100 : 62.5(+25%) by 37.5(-25%)
Red: 100 : 67.5(+35%) by 32.5(-35%)
Black:. 100 : 72.5(+45%) by 27.5(-45%)

Do note the result should always be upper+lower is equal to Front
Example: 67.5 + 32.5 = 100

Calculation:

A = Front Fuselage height thickness
B = Back Fuselage height thickness
C = X%
Solutions:

1). Upper Fuselage:

B = ( A x 2) + C

Example:

B = (0.3 x 2) +25%
B = 0.6 +25%
B = 0.75 height thickness

2). Lower Fuselage:

B = (A x 2) - C

Example:

B = (0.3 x 2) -25%
B = 0.6 - 25%
B = 0.45 height thickness