>>291494162
>a puck unity package I got from someone
well regardless whether you personally ripped it or someone else did, it's a cache rip. Which I personally have no moral qualms about, but it's going to be difficult to work with technically. 

I'm not sure what the 'fix model' button in CATS does exactly, but given it's a cache rip you should probably proceed without it, if everything's already in the right place.