I would not be complacent about the possibility of flutter.
My Mig 29 flew perfectly well but had stab. Flutter on its last flight, which it survived.
My Mig stabs. now have some balance ahead of the pivot axis which is at about 25 % mac.
In addition I have changed the servos, one on each stab., to the highly impressive Futaba HPS a700 and eliminated all slop in the control rods. These are very powerful servos with a very “tight” gear train which should make the whole setup highly resistant to flutter, which can be so quickly destructive. .I was lucky not to lose the Mig.