Remeasured the spot positions:
DCPD1: 1.50mm+0.085mm => Beam 0.084mm too high
DCPD2: 1.50mm+0.085mm => Beam 0.023mm too high
QPD1: 1.25mm+0.085mm => Beam 0.001mm too low
QPD2: 1.25mm+0.085mm => Beam 0.155mm too low