After printing the original Lego Mini Figure by ustkl, I found that probably because of the printer and materials differ, some holes or bosses don't tightly fit LEGO's size.
So I imported the original STL into Fusion 360, modified:
neck thicker
hip - legs joint boss thicker
hip - upper body joint boss thicker
hole in the sole of the foot smaller
and now if I print it with Makergear M3 (almost the same as M2 v4 I guess) it perfectly fits LEGOs.
Printer Brand:
MakerGear
Printer:
MakerGear M2
Rafts:
No
Supports:
No