the only let down for GIAC is the fact you cant fiddle with the setting on it!, so if you get WMI with GIAC you wont be able to advance the timing alone to get more bhp, but with revo or APR you could add on 6-9 degrees timing and see 20-30bhp increase...
im sure it will be possible to see 400bhp from my car but to get that last 20BHP for me i would need to spend a couple of thousand for the likes of cams, wmi, port polish, skim head. i cant see anyone doing this as it would be more viable just to add internals and turbo for an extra thousand and get up to 450-500bhp
Are you sure lemmiwinks will not work on your software as it works with my APR code (different engines i know). Is it compatible with the 2.0T ecu codes.