The original camera position put it close to the MPCNC’s DW660 spindle:
Unfortunately, it sat slightly too close to the gantry roller along the X-axis for comfort.
The effort required to pry the mount off its hot-melt glue bed showed it wasn’t ever going to shake loose, so I fired up the glue gun and stuck it to a better spot on the XY assembly:
Seen from the side:
Bonus: it’s now trivially easy to tweak the locking screw!
Realigning the camera and recalibrating its offset proceeded as before.