Hey buddy, thanks for giving it a go! Great to see that you like the project so far. Regarding the handling, have you tried limiting speed to the ACM speed window? I tried to put more influence on speed management by penalising mobility at high speeds and giving bonuses within the ACM window. For aircraft like the F/A-18, NRP-20 and I-21, double-tapping and holding brake should also enable supermaneuverability mode which might help in giving that feeling of inertia you're chasing!