I'm using CoreXY actually. With current reduction 0.07mm corresponds to 28 full steps, but it will be 7 when correct pulleys arrive…

That would really need to use jerk/accel values to not skip steps I suppose.
The way I understand it, we would need a way to determine if axis is changing direction, and then add an appropriate amount to Z move command? Or am I missing something important here? Either way, I'm not asking/hoping this will be implemented soon (or at all), just wondering, that's all.

Would implementing Z axis backlash/hysteresis compensation be any easier than X/Y axes?
I am using a belt driven Z with a worm drive reduction. And as such, upon reversing travel direction, I have ~0.07mm of dead space… That's not really a problem for regular usage (one direction movement), but I would like to use mesh bed compensation eventually, and that would pose a bit of a problem...