well, when you call II and order an sps62, it comes with a .80 (14cm) turbine housing... you say yours is a 12cm... I have heard of them special making them, but when I called to ask them to cut me a 12cm turbine housing for the 71 wheel, whoever I was talking with said they wouldn't do it.
that's why everyone is curious about what exactly it is that you've got.
I've actually only heard of one other sps62/12 besides yours.
you say yours is brand new, but you don't seem to imply that you specificly requested a custom turbine housing, so we're wondering exactly what you've got