I've increased the boost on the na+t territory and it makes a bit over 300awkw and 600nm on 15psi. As a result the trans needed an update to the tune, which I did this morning. Once again the shifts are quick and crisp and you wouldn't know it's an na trans in there.
I think this is where I'll stop the increase in power, it is a na engine after all. When the time is right I'll do some minor engine work to it so it can handle all the boost, but for now it will do.