Silly question but are the sensors completely unshrouded? I had a screen replaced on previous car & there was a gasket btw the sensor module and the screen. When the guy refitted the sensor, the gasket rotated and partially shrouded the sensors. I showed him what he'd done and it was a bit of a revelation to him! There should be no need to re calibrate anything if the screen is like for like & the sensor is repositioned correctly with all the eyes unshrouded. Any probs & they should return & fix for you.