I downloaded KISSlicer and tuned my profiles, etc. The quality was pretty good. The problem was when I tried printing a small model using lower layer thickness (I ussually use 0.2mm). For small models, and 0.2mm layer thickness the quality was acceptable but not the best. At lower thickness it was almost garbage
At 0.08 the print was....
I tried printing single walled sqares, and they came out pretty good. My caliper measured 0.4mm in the walls on every model (+- 0.02mm or so)
I also calibrated my printer e-steps over and over again. But nothing worked. The lower the layer thickness, the worse it was.
Well... 2 days later (and tons of little angels later
), I realized what was wrong. 
All this time I was printing using Relative-E distances, and such small models (and layer thickness) generate very small E movements. So small the firmware simply ignores them.
I mean, I think it's reasonable. Should have realized sooner
.So in the end, I switched to absolute-E and everything is fine for small layer thickness (and I can finally use that sweet variable layer thicknes feature
)Finally, a nice 0.08mm print...
Again, I know this is not KISSlicer fault. Not even sure it is my firmware fault (idk, the firmware could keep track of small movements and accumulate them, but again, I never updated my firmware in the first place
)So that's it. I only regret I used orange PLA, it's so bright it's really difficult to take good photos
