All parts fit together without any additional hardware. Mounting holes are sized for standard drywall screws.
Printed with PLA+, Generic PLA settings in Cura.
Parts:
1 Base rail - I printed with supports, and orientated the long dimension vertically.
1 Pinion
2 arms - Print these first to see if your headset will work with them.
2 long dovetail racks with teeth
2 short dovetail racks
Assembly:
The pinion slides into the two sloped pins inside the base rail. It will only go in from one side.
Slide a long and a short dovetail rack onto each arm, and slide into the base rail. Try to engage the pinion with both rails at the same time to keep them equal. A small raised bump on each side of the base rail keeps the arms from sliding out of the frame when extending.
The author marked this model as their own original creation.