Hit it on the head of nail Exorcet. 7-10 g's was likely a quick maintenance inspection, and a free six pack from the pilot to the maintenance crew for being a bonehead. Over 10 likely required the engine to be dropped borescoped, spars checked blah blah blah. With no persistent map or server monitoring continual use, it is almost not worth the effort to make this too detailed. Over 10g's you could have gear doors and stores ripped off (or something similar) increasing exponentially from there. From say 7-10g have a more random way for minor pieces of damage to occur or bend up there aircraft's dihedral so it flies cockeyed.