Thanks! Love the tone of your 4003FL too. Your playing is excellent.Good question! I've never used a Ric 4003FL with rounds. Apparently the bubinga is tougher than most wood (not as tough as ebony though) so it could likely stand up to rounds in a way other woods like Indian rosewood might not.
Rickenbrother, that's a really great recording of "Georgia On My Mind", and your fretless tone is marvelous--as I've said elsewhere. Really glad to hear a recording using the Ric foam mute too.
I hope soon I'll have a nice recording with my 4003FL, which does have roundwound strings.