I'm not saying the tuner isn't good, (I have heard he's great) just that without VQ specific experience you will be paying for his learning curve, as I did.
Directly related or not, the AFM is the main source of load input data for the stock ecu. If the AFM is at 4.8v then the trans is definitely shifting at full line pressure. Further to that, it shifts fine tuned in limp mode, with the EMU setup as a standalone as the line pressure defaults to maximum. (There's just no kick down.)