I'm a double delta too! I'm 29 and my most recent FEV1 was 34%. I was not diagnosed until I was 11 though, so I missed out on a lot of preventative maintenance. Apparently I HAD a "mild" case too. Then I lived in denial for a few years (I mean, puberty AND a CF diagnosis all at once? How much worse can it get for a kid who just wants to be like everyone else?) so I refused to do treatments, take pills, etc. It took me several years to come to terms with my CF and I was definitely not good to myself during that time. Wish I knew then what I know now...well I DID know it then, I just didn't have the capacity to understand what a huge impact my actions (or lack thereof) would have on the rest of my life (which, by the way, is one of the reasons why I don't think children should be tried as adults, but I digress...)