Carrier board schematic for an open microscope: the LDD-1000H LED driver DIM is pin 22, not 21, while the Mean Well sheet gives 21 for the 1200 and 1500 mA models, and the door interlock depends on that pin. An RP2350 input fault flipped the door-sense design to pull-downs under 6.8 kohm, and FreeCAD sometimes saves treeRank values that broke a reproducibility check.