Sensors in quads are aligned individually (see CSPad Alignment of quads for cxi80410-r0628) using their natural coordinates as from the optical measurement (top-left corner is an origin, nearest point to the beam spot).
Quads are rotated and inserted in uniform 2-D array with appropriate offsets.

Earlier versions of CSPad alignment

Alignment tool

Takes image of CSPad or quad from 2-D array
Draw lines along the wire shadows
Interactively adjust lines along the wire shadows
Plots:
- image
- image profile
- deviation of the shadow "center of gravity" from line along the line

...

See CSPad Alignment of quads for cxi80410-r0628 for sensor position parameters in quads.

...