This is a simple adapter for a typical green laser to be mounted onto a Sky-Watcher finder scope.
It features an expanding clamp that goes into a recess in the stock finder mount. Alignment is done via three M4 screws, their holes have to be tapped after printing, the plastic threads should be plenty strong for collimation forces.
Two M3 cap head screws 32mm long and two M3 nuts are necessary, they are holding the adapter together and pull the wedge that expands the adapter in the finder holder.
The laser this is designed for is 23mm in diameter but as usual I'm uploading a Sketchup file for anyone to tweak the design to their needs.
You may also be interested in a rotary switch designed for this laser pointer.
Three M4 thumb screws 9mm long at the minimum
Two M3 cap head screws 32mm long
Two M3 nuts