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Hi,
Well, there is a little rotational backlash sure, but the nice thing is, it is compensated by the gear system.
We use a 30:1 gear system and that reduces the backlash to the filament to next to nothing.
I use 1.2 mm retraction on my big Delta and it works fine.

I did the math once and if the cable had an extra twist of 90 degrees (which it doesn't) the total filament movement was 0.2 mm. The cable is a lot stiffer in torque than that, so the actual movement is even less.

Lykle