@debw1017 My 2 sources are my pulmonologist and free chat gpt. I think success has a lot to do with clearing impacted mucus and if the airways can recover. My challenge is the clearing of what's impacted. I can't use the vest, and nebulizing with ACT, just isn't enough. I have no idea on the stats on the chance or extent of lung restructuring after 12-18 months, but I have heard of people's PFT improving.