Spent the day setting the boost up on my Orion EFi Turbo, which started well. Boosting at around 5psi and other than feeling hesitant to drive it was fine. Got the boost up to around 8/9psi (standard ecu/no chip) and it drove better but smoked heavily on boost and even more on overrun (which i put down to the 2nd hand exhaust i'd installed). Then tried a spare OFAC ecu, to see if it would cure the hesitation and the car drove better but would not make any boost at all - nothing whatsoever...
Swapped actuators, adjusted them checked for boost/vacumn leaks, even put the original OFAC ecu back in. Now it occasionally hits 1-2psi and then drops right off boost to Zero and sometimes doesnt boost at all! Turbo sounds fine, spools up nicely and sounds as if its coming on boost and its no longer smoking but i get nothing - no boost!

Maybe ive blown the turbo (a recon'd by myself T3)? What else could it be?