does your printer challenge this ultimative part?check it out and get (almost) instant results.these test are included in this tiny file:size: the object is 4x50x50mm (baseplate)hole size: 3 holes (3/4/5mm)Nut size: M4 Nut should fit perfectlyfine details: pyramide, cone, all numbersrounded print: wave, half sphereminimum distance between walls: 0.1/0.2/0.3/0.4/0.5mmoverhang: 25°/30°/35°/40°/45°bridge print: 2/3/4/5/6/7/8/9mmsurface: all the flat partsthere could be a lot of things go wrong, here the most common ones- your printbed is not leveled (should be better than layerheigth you're printing, e.g use a Micrometre)- your axis (Y/X/Z) clearence (with higher speed you also get problems with the moving mass)- your slicer and configuration (every slicer handles things different and could contain bugs)- retract settings (not correctly set you will see blobs or holes on every retract position)- to high temperature (small details will get overheated)Here are more infos about his part. http://3dprint.com/48922/3d-printer-calibrating-test/