I quickly wrote you all the types of mods I made, just because you asked me, extending the description.
Anyway, the first mod that changes the behavior is the addition of weight on the arms, then there are the CF propellers, removing the DJI quick couplings [badly made], and without software-firmware mods you cannot descend at 10m/s, cannot change the accelerations, the automatic return speed, cancel the precautionary return to home and forced landing, imposed by the DJI software which considers the batteries too low to stay in the air, even if is not true.
Each modification can produce small or big differences during the flight.
I have reported my experience to reassure DDJJR74 perplexed by the behaviour of his Inspire during the fast coming down... that I think, maybe is not so fast, not 10m/s.
Still confused?