This is a very simple (and fast to print) Laser Pointer adapter for coupling it to a Telescope ViewFinder (Skywatcher in my case).
Coupling makes laser parallel to viewfinder sight of view, so if one collimates viewfinder visually with its screws and align it to the main telescope (what it is always necessary), laser pointer is aligned also "automagically".
Clamps made of ABS are flexible enough to allow laser pointer installation with a simple "click", no additional screws.
Also clamps are so short that provide a very rigid piggy back.
STL and FreeCAD files are provided so only check diameter of your ViewFinder and your Laser pointer and customize to your needs.