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Linear rail on Z axis

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Does anyone modded I3 with linear rail instead of smooth shaft for Z axis? I want do that with minimum modification and it looks like no one did it with I3 so will have to design parts from scratch.

I have just done mine. It's pretty simple.
Change the rods, change your steps per mm for the Z axis to 400. Working wonderfully

I think you are about replacing thread rods with proper type, different thing.