Hello Johann, I got your name from another user of this forum - Nancy Sliwa. She indicated that you may be quite knowledgeable about Rife Therapy. I am trying to help my husband who has Stage IV cancer - Squamous Cell Carcinoma of the Head and Neck, with now Recurrent Metastasis to the lungs - 3 large tumors in the Right lung. He has gone through chemo twice and radiation therapy twice. Most recently I have acquired GB 4000/Mopa - and the manual has several frequency lists. It seems like you are quite knowledgeable about Rife and frequencies to use - would you have suggestions as to what may be the best frequencies to use for my husband? I would appreciate any guidance you may provide in terms of using Rife, and specific frequencies.. Sincerely Sonal Shah