This one has a reduction of hardware required utilizing a clip construction instead of 4x M3 screws. This makes it more accessible to those that do not have access to, or quantity of hardware. In addition, to the flashlight, I added a slot to fit a small laser pointer (Note: it may not be very accurate, and it is not adjustable yet). To connect the two parts, a string of 1.75mm filament will fit perfectly through. Just make sure that it is cut down to proper size.