I included gcode files so you can get my settings exactly. I level the nozzle the "normal" way where I don't squish the first layer too much (to avoid getting a micro brim). These gcode files are for 0.8mm nozzle. I put the parts in the left front corner so they can be printed on um2go if desired. These gcode files print on any um2 series printer. do not print stl file of the center piece by itself. Even with 100% fan it will print too small (because it doesn't have time to cool between layers) and the hex part will not slide in and other issues. So print 2 side by side like I did or print a box shaped tower at least one layer taller than this part next to it. If printed with .8 nozzle in pla it will be around 1.9nM. I prefer 1.5nM so I use a file and file the tips of the arms 2 seconds each (total of about 18 seconds to do the 9 arms).