Ever since I have received this laser I have reached out to STYLECNC regarding issues with brass and aluminum alloys (cuts with burrs). I waited a full 12 hours for a response, during which time I had to try to adjust cut parameters myself with the manual to troubleshoot (not yet resolved). As a result, with Ben's help, I reduced the laser power and increased the auxiliary gas pressure to get rid of this trouble, resulting in smooth and clean cuts. What pisses me off is waiting so long. Their explanation was jet lag, but it turned out well anyway. In addition, I tried to sever 1/4" stainless steel and 1/2" mild steel with different laser powers, working as expected and cutting through with ease. So far, every cut is slag-free, requires no grinder for additional cleanup, and wastes less metal than traditional mechanical cutting tools. It will take me some time to get used to this new metal laser cutter machine, requiring a little practice to play with it.