[Jeff, Daniel]
We attached the Infleqtion PICAS 2D Rb MOT Adapter Plate to a 2.75" CF Bellows with 1.25" long 1/4-28 screws and no washers. 0.875" long screws weren't quite long enough. The gasket was initially incorrectly seated on the knife edges; putting the curved edge on the bellows seemed to help when I tried again with a new gasket. I tightened the bolts to 14 Nm, the standard for 2.75" CF thru flanges, and made steel to steel contact all around.