Hans,
I only own one machine, the GB-4000. I would like to get one of Bruce Stenulsons machines also. The only reason is because different machines have different delivery methods, power settings, and other variations that may produce different results. I would still use my GB as the function generator since it does about everything you could want unless you want to run a sawtooth wave form. Then you could use a computer generated wave form for that.
Other than that, I have no need for any more Rife machines. Just need a few extra thousand dollars. Always seem to need that. Oh, maybe I would need a MWO, Beck blood electrifier,microcurrent machine........................
Dan Bergman