Im looking into buying one of these printers (RepRapGuru I3 kit). One thing that I've noticed with the DIY i3 printers is that a lot of their power supplies are catching fire, sparking, or smoking... Possibly dangerous stuff. Has that ever been an issue with this printer or is this one safer than the others? / Is the power supply that is used in the kit a reliable power supply or a cheap Chinese knockoff?

I think it's a Chinese psu. I have been running mine non stop for almost a year and had no problems. But, I have heavily modified the printer over that time as well.

stepper motor for the x axis makes click noise like as if the belt is skipping teeth but the belt it isn't and it doesn't move.
any ideas? Well it was working but going the wrong way. so I flipped the connecter like the video said and this is the result