If I compare the z positions of the Tracker planes obtained via
MiceModule::globalPosition().getZ()
with those that come out of the Kalman, the behaviour is not consistent. I can send a beam through and get exact matching and then I send another beam through (same geometry etc.) and some of the z positions will be out by up to 0.3mm. Unfortunately this is just enough prevent identifying the tracker plane by the z position (while the plane is stored in the SciFiTrackPoint object, it is not stored in the global TrackPoint object)