Yeah, I agree about the Rios. I've had 3 go bad on me and 'bite' me a bit (and did not trip GFCI's in 2 of the instances -- presumably because of the lack of the grouding prong). Thankfully not too severe and I've not yet had one melt down. I'm trying to replace them as they go to 'bite' stage (or if something breaks), but having said that I have to say that I still ordered Rio 800's for use in CPR backpacks. I tried using a MJ1200 with the adapter in one CPR and it just doesn't produce the same about of skimmate that the Rio 800 does. But if I had some other option and wasn't trying to generate foam, I'd certainly choose another brand. JMO
Doug