Ender 3 v3 se z offset default July 8, 2019 16 32 64 128 Creality ender 3 v3 se default z offset Ender 3 set z offset Ender 3 s1 retraction settings Ender 3 v2 cura setup Ender 3 v2 stringing fix Ender 3 s1 setup guide