@Arie - apologies, i messaged before hunting for it. it was more a reaction out of frustration. :)
@Arie + Gaurav - FYI - let me clarify my problem. The definition seems to misbehave when there is a curvature change (from synclastic to anticlastic) in a single Srf. also the panelling seems to relax the surface a bit too much, taking it far away from original curvatures.
@Abhishek yes you are rite this definition poses problem on anticlastic surface. But for synclastic curvature if shape is not retained I think intensity of kangaroo forces Should be altered. For retaining shape, planar force can be reduced a bit and curve pull can be tweeked up.
Hey abhishek I have achieved sucess in getting this defination work. We should be careful of surface which we are creating. This definition works best for open lofted surface. When used with closed lofted surface it poses problems sometime.