If they say they are having technical difficulties then they must be under the pump. I have purchased numerous items off of them for years now and I am sure they havent gone under yet. Maybe just give them a little more time
If you do that then that is a lot of labour time. Put on dyno. Take off dyno fit part put on dyno take off dyno fit another etc.
Is that what you mean?
Is the idle higher?
It's very easy to check AAC. As in super easy. I don't see how they could clean it without removing it. Unless they put upper engine cleaner through the car.
I can't wait to see the results of this. The only other person who claimed close to this power on these turbos could never back it up.
I think these run out of puff at about 23/24 psi. Is that how much you want to run?