3 Deg Rear Toe on X6

[MeBeMikey]

When would you run 3 Deg rear toe on an X6? Im running 3.5 at the moment, not for any reason (3deg rear block with .5 hubs). Seems to work really well like this. I just tried it and left it. Set-ups I have seen are all 4 deg despite surface. Looking at fellow racers with dif cars they are running as low as 2 deg and some of them are quite good drivers in the UK, IE Dean Gibbs.