I think you're on target here, it seems logical to me. Any mechanical ringing is likely to have an effect on the sound, just like microphonics. Ringing mostly affects high frequencies, and mesh has superior mechanical damping qualities. I see a lot of people mention that the soundstage feels more "layered" with mesh tubes and that might be a side effect of the reduced ringing. I've been leaning towards doing mesh for a good while now, if for no other reason than if I'm buying special expensive tubes I might as well go for the most special version. edit: of course what I REALLY want are those EML 45 Globes that they only made one time a decade ago. Every once in a while somebody lets their spare pair from that one-time buy go and I think they're closing in on WE 300b prices now. I will never have that kind of money to throw at this hobby so I'll have to settle for standard production meshies.