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There are also more radical approaches. KevinAkaSam has a mod that foregoes leadscrews altogether, using a system of belts to drive the Z-axis instead. This is still a Cartesian printer, but since there are no leadscrews, there is no leadscrew wobble. It still uses only one motor (like the belted-leadscrew approach above, though it moves that motor to the top of the printer, so you might need a longer cable for it.
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