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Two reasons why I used Hiwin bearing blocks for the X-axis and the Y-axis.
The cheap ones have errors that later determine the print quality.
Quality problem: (1) and (2).

I do not do advertising for hinwin, but they're the best.

On the Z-axis are not so big and fast movements, because I do not use Hiwin bearing blocks.

From 5 purchased (no Hiwin) linear blocks I was able to use 3 with good quality