
Nahh
What you need to adjust is the MOI numbers in the cfg file. Forget all that rubbish about null zones. NO aircraft in real life has null zones in its controls. It would have its CoA revoked.
If you want a heavier and less skittish aircraft in pitch, increase the empty_weight_pitch_MOI. I've just been doing it with Ole Egholm's Cherokee 140. First adjustment was to increase the figure from 975 to 1475 and it's already much more like the real 140s I've flown.
But if you take a real heavy, the numbers are completely different. Take the AN22 for example. There you have a pitch MOI of 15352310. Get the idea?
You can play the same game with roll MOI.
But be careful with yaw MOI. That has a completely different effect. If you make the number too big it doesn't seem to do too much in the air, but it increases your turning circle on the ground by a silly amount. It's an important one when you're playing with AI planes because it affects how they manoeuvre on the ground.
Lots of people have asked for a tute on playing with FDEs but there's just too much to it. You learn by feel and doing it. But the MOI adjustments you make are pretty important ones and have a big effect on how a plane 'feels' and handles.