I just built the N0SS Noise Generator that I bought the parts for 3 years ago and it works great. I used it along with Spectrogram to align my new K2 and it sounds great. If it gets better with the KSB2 it will sound unbelievable. I am also wondering what parts I need to change for the 2.5KC mod. I have not started to build it yet so I can do the mod as I go. 72's Dan N0DT