Thanks for the comment on the video. And yup, the Clack and Fleck valves are really very simple. They are also both extremely high quality. Whats even better is how little repair work they need. I just started a video of a rebuild of a nearly 15 year old Fleck 5000SE. The original 5000 (ProFlo) with the electromechanical controller was not very good. The electronic version has been a workhorse, needing almost no repair work. Some people scoffed at the idea of a plastic piston rod, this video will show just how well a properly designed one can last. I am hoping to have it posted by the end of the weekend. But... I have a parade to get ready for. If you check out my other videos, you will see my Jeep in its Christmas lights attire. We have one first place three years in a row, with the upgrades we have added this year, we are planning on win #4! [video=youtube;p60VmkjEFRY]http://www.youtube.com/watch?v=p60VmkjEFRY&list=UUL7f2aKKWBuAhzru29_Wv5A& index=5&feature=plcp[/video]