Win4k3 suite software for rig control for over a year now. Tom VA2SFQ has software what will work with the Elecraft K3,K3S, KX3 and KX2. Tom has been updating the software on a very consistent basis. The software is very stable one just has to read Eham to see it's rated 4.9 out of 5. I have emailed Tom with some questions and he has replied very fast with a solution. Recently I had some issues and we were emailing back and forth to try to bring things to a resolution. On the weekend Tom asked me if I had Teamviewer (and I do) he wanted to use Teamviewer to take control of my PC and solve my issue once and for all. On Saturday evening I received a call from Tom on my cell and we linked my PC via Teamviewer and Tom took control. Tom stuck with me for 40 mins and he solved my issue and I was up and running again. I have never in all my days had this type of customer service. It is very obvious that Tom is committed to not only his software but to his customers. Tom was very pleasant on the phone as he sorted out the problem.