Hello Joern,
We don't typically disclose this level of detail on the internal design but would like to learn more about this sensitivity. The sensor locations, inside of the package, are not observed as a process variable in the assembly process. While the assembly process is fairly well controlled, I don't have enough information to assure "sub-mm" levels of certainty. For this reason, the point of percussion alignment uses unit-specific test data to map the accelerometer response to that particular corner in the device. If this does not suffice, can you help us understand why?
Best,
Mark