I don't really like how my solo has a loose stem and don't like the way the airflow pulls so fast . I think it's like that cause if how loose the parts are. So I ordered rings from PV .Does anyone know if these rings actually help or am I having too high if hopes
If you don't like how "fast" the draw is, then yes the o-ring will block some of the air flow. It also helps with the looseness.