Ok,
Turns out I have figured out a way to finish the F-16XL 'cranked arrow' wings...
It got very luckin indeed... to truly simulate the way the wing is designed the wings leading edges and trail edges are 'cranked' into different directions... However the F-16 wing itself doesnt have enough polygons to create all the different angles for the leading and trailing edges... the leading edge 'crank' was ok, but I was short 1 rectangle polgon for the trail edge 'crank' outside the flaps...
I was... until I got very lucky indeed with the existing design of the flaps on the F-16 model... instead of being one rectangle polygon on top and one on the bottom, it turns out the flaps are a set of two side by side rectangle polgons on top and two on the bottom(one set very small, but easy to expand)... so I was able to seperate them and use one rectangle polygon each on the top and bottom for the trailing edge 'crank' and 1 rectangle polgon each for the inboard flaps... and this works in both up and down flap positions...
So expect some screenshots of the new F-16XL very shortly! I just have to work on the skin and lengthen the rear fuselage and afterburner cone to the proper longer length for the XL( and this is easy to do)...

I will keep you all updated...
CAG out...