The model
The slider is held by the dovetail-shaped center rail and cannot be lifted off. The two tongues are 15 mm long and 1.5 mm thick. Their lugs stand 0.8 mm into the notches and have to flex by that amount when you slide on; the strain stays at 0.8 %. The notches have a 45° and a 60° flank and the tongues work in opposite directions, so the resistance is the same both ways.
On top the slider has a thumb recess with five ribs. The travel is 35 mm over eight detents and is calculated in 36 positions.
Two ways to print: KlickSchieber.stl is the print-in-place file in one color. For red and white you print Schiene_offen, Schlitten and Endclip separately, push the slider in and press the clip from above into the dovetail grooves, where it latches.
View print notes (German)
Print notes included in German; part names are self-explanatory.