I emailed Kingwin about a broken C-Clip Tool and they responded in about 3 days. They said they would send me a new tool and I also had a leak in my resevoir, where the screw cap is... and they said that if it was a year since I bought it, they would RMA it with no charge. I could have done that but I modified the crap out of it and I did not feel right for sending it back. They did attempt to give me a new tool though, by attempt I mean they sent me New tubing, new connectors, new thermal probe... but no clip! I really did not care because a needle nose works just fine though.
I guess just be patient in emailing them.
Bryan D.