A few days ago I installed the Stg1 OFT tune. Congratulations to Shiv for his professional job and the results. The tune works as expected and there are no negative issues with the bigger TB. I am more impressed with the smoothness of the engine and the much better torque curve in the middle RPM range. Reason of the latter is the "removal" of the inner EGR (Exhaust Gas Recirculation) system. Evidence that the EGR can be removed, only with an ECU tune, is the following article:
I have not done yet a WOT up to the redline, so I cannot comment about gains on higher RPMs . Just waiting the ECU to learn a bit better the new mapping.