i dont like welded diffs, that said i havent had one myself, and for that reason
from a rallying point of view, at the end of the day i dont think it makes the car any quicker, yeah sure they get big slides through the corner, but they are forced to do this on every corner and as we should all know it's not nesecarily the fastet way through a corner
i prefer the sprung load locker which i use at $250 it's not as good as an lsd, but it's a step closer than a single spinner