Hi,
This is my new 3d wip. Im doing a Sukhoi 30 Mk2 KnAAPO version.
I usually drew a lines along the body/fuselage to memorize the profile curves for a better accuracy of modeling.
Here im using a spline-surface method for modeling. Its pretty tricky, as i tried up to 8 attempts to perfect it.
I might re-do it all over again in polygon-subdivision/meshmooth technique. Just in case im still remember how to do the polygon-subdivision methode. LOL 🙂
Thanks to Dawestsides for providing the highres blueprint.
Siregar3D 
Very cool start, the mesh is very smooth although the nature of it is very complicated.
Looking forward for the next progress! 🙂
There is a disadvantages when modeling in spline technique.
The rear part looks very clean and smooth flow, but the front part is a nightmare to fix.
I just re-do the whole part in planar modeling today.
hopefully can post some progress by today.