[captain harlock]

Fioroni diffs are built with extreme precision. They're made in Italy and this is why they're so darn pricy. Even if they make a couple of screws for your kit, it'll cost some real money, and to tell the truth, they aren't that different from the other top of the line diffs( wheather torsen or regular). It's just that it is made in Italy and the quality of the material used. If Tamiya makes a torsen diff, too, it'll be as expensive simply because tamiya is a top notch manufacturer.