clonecity1, I'm not aware of such SOPs but it makes sense to me. Most certainly all the handling characteristics are within certification limits etc without any additives. However with forward CG and performance being NO factor, it's considered it a good practice to select Flap 3 and add coupla knots for the sake of better controllability. On the contrary with rearward CG Flaps full is more useful and no additives as the controls are more touchy once in direct law. I remember this being merely a recommendation certainly not SOP.
It adds some elegance to your flying, methinks.
