Yes I hear it at start up for about 5 seconds, I think this is the same sound I am hearing at idle sometimes. I was just out on the interstate a few minutes ago. At 2500 rpm I floored it and the drivetrain performed as it should, this car is still quick. After a few miles of steady driving, I got off the interstate and putted around town and the drivetrain had one hiccup, I was at low rpms and was just cruising through town in traffic. I let off the gas and it was fine again. At a stoplight I heard the buzz again for about 2 seconds, so I think the buzz has been identified now as the SAI, still working on the other.