The old baffle had an elliptical aperture geometry, the new one has a circular clear aperture (110 mm diameter): see first baffle on last Figure.
Pic1: Baffle already installed on the BS side of the SR tower.
Pic2-3-4: Couple of baffles on the detection side of the SR tower (the little one was the one which has been replaced).
Pic5-6: Rectangular baffle attached to the SR tower wall (South side) to eventually dump light reflected by the baffles on the detection side.
Pic7: From SR towards BS.
Pic8: From SR towards Detection.
