What psi are you running?
As I said on your other thread that bleed valve is not needed for stock turbo'd GTR, especially when you've removed the restrictor.
If you run above 14psi, the ceramic wheels could split and dust go into the motor - bye bye motor.
Trent of Status will be back on 30th August, I'd go to him. But I haven't been to Hi-Torque before, so can't comment on them.