*This model require 9x 10mm M3 screw (this allow to print the side details separatly and make painting easier a cleaner) The screw are optional, but make the range finder much more stronger.
The range finder mechanism is pretty simple, there is a pin that have enought friction to hold the range finder. Depending of your printer, the fit can be loose or tight. To adjust it, the pin can be scale UN or down to fit. (It's only 1-2g of filament)