I would have to seriously damage something of his...............maybe his ballsack with the same screws!!! That is the worse display of work on a car i have seen in a long time. you could easily do a better DIY job!!!. Just dont see how you rectify it tho thats a severely damaged 350z.
I find it almost unbelievable that the guy says it'll be hard to get legal retribution cos the work was signed off.
Exactly how blind would you have to be not to notice anything amiss, even in the dark?