Sandy, I just received an email from Robert Lesko of AmerGraph. He has convinced me to hold out until the production run of the ULF-28 is completed. This sounds like a great unit. Please keep us updated on your test results. He has also informed me that there will be a nice discount for apug members. They picked the right man to test the prototype. Keep up the good work. And thank you again for your contribution to ULF.