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