windwalker ---- Dr told me that some people have bronchial spasms and he wanted me there in case breathing was an issue. He said there would be nurses with me the whole time of the trial (so I assume he's had some experience that wasn't good). Are you saying that at this time you are having a little difficulty with it -- after using it for two years? He also said if I can tolerate it they would re-evaluate me after a year to see if I needed anything more. It's a 10-hour drive (stopping only for gas and bathroom -- eating a sandwich on the go). Not great fun but will do it. Thanks for responding.