First of all I've never had a problem with anything from Metcal. You have amazing products. I have an MX-5000 and all the tools they sell for it. I bought it about a month ago and haven't used it yet, but the board was recently repaired. I took out the tip, pocketed it and tinned it. I noticed that the tip no longer melts the solder. I checked that the tip was inserted correctly, restarted the station's power supply and nothing. We turn on the station with the tip in, the number fluctuates, but then says done and stays at 05. I checked my old tips, they still work. I hate leaving bad reviews and I understand products are sometimes factory defective, but I paid for an item that didn't work on the first try.