Free
Those S22 sliders add an extra pair of wheels, perpendicular to the others. These wheels take care of the inward pressure placed on the sliders.
The body, axles and cover can be made of PLA+ or PETG, ABS, whatever is strong. Print them almost solid (8 walls)
The wheels and dust caps are made of TPU, use random seam location for smoother wheels.
You need: 8x14x4 bearing (28) M2x8 screws (4)
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