Hello Hans
Firstly let me congratulate you - you are a son any parent would be proud of, and I believe you have chosen the best Rife device available. I have a friend who tests these devices for a major coproation here and the GB4000 beats units costing more than ten times the price.
I'm not going to give you more cancer advice - you've had more than enough and I don't want to confuse you except to say... when using the SRT-4, I would not go above quarter past the hour on the power control - at least until your Mum indicates she can handle it. You DO need power when dealing with cancer but too MUCH power can also be harmful.
It has been interesting to observe your concern re scanning which I share in fact. In the GB4000 it is called "Channel Sweep" and you can sweep from 10 to 1000 Hz either side of your selected frequencies. Personally, I would NEVER go more than 20Hz either side because who knows if you are now taking out healthy cells in the process? I'm not saying it's wrong - I just feel there could be considerable risk in doing so.
You will note that teatments are advised to be spaced every two days and I support that but I would also run auto channels for detoxification, and ESPECIALLY candida. New research is showing that virtually all cancer patents have candida and the possibility of a link is being questioned. And I also think it is critical to run the auto channels for inflammation, and boosting the immune system.
With that out of the way, it is important to appreciate that a person's mental state is perhaps more important that any of the above. Whatever you can do to take your Mum to a place of not being a victim of the cancer and instead believing she can BEAT it will help in the extreme. In order to beat cancer - you have to believe it CAN be beaten.
And finally - cancer LOVES sugar - get your Mum off all sugar if possible - I don't know if Stevia is available in Aussie but if it is, it has been named as the best substitute and some of the powdered Stevia brands have virtually no taste. The best (other) substitue which you have plenty of over there is honey. As supplements Coriolus versicolor (1,000mg three times daily on an empty stomach), and Maitake (0.5-1gm per Kg of body weight divided into 3 applications/day on an empty stomach) have all been cited by Dr. James E Balch [MD} as being specifically helpful for lung cancer.
I wish you and your mum all the very best in this battle.
Rgds
Tom