I'm not sure either. In my kOmegaSST run (again y+<1 everywhere), I used kLowReWallFunction, omegaWallFunction (which is suitable for both low and high-Re approaches) and nutLowReWallFunction for k, omega and nut respectively and all went fine. Hence, I really cannot understand why the wall shear stress is greatly overestimated with the SSG model. Also, I put 25 inflation layers, which should be enough to fully resolve the profiles of the transported quantities