Having a myriad small glass fragments and an idea for their use created the problems of organizing the pieces while not losing them under the bench.
Blow out the contrast, flip right-to-left, then mask them en masse:
Delete the images (inside their selection masks) to create a binary mask:
Have LightBurn trace the binary images, wrap a rounded rectangle around the lot of them, duplicate the rectangle as a base plate, then fire the laser:
They’re not secured in their sockets, but they won’t fall out unless I fat-finger the whole affair:
The thing that takes getting used to: the whole process was about two hours of wall clock time from start to finish, with a leisurely breakfast and KP in the middle.