Man, you must be tripping. Everyone knows it's not the grotto that yields the best cap tone, it's only by hanging them from the trees swept by the winds from the chasm of Mojo besides the castle that does the trick...and it only takes ~5 years if they are handled by *any* guitar celebrity prior to packaging. Except Esteban. I've heard Bonamassa can speed it up to six months, even.
And you can forget about them oak barrels too, it's gotta be aerated for the rare earth elements to be able to affect the core of the caps without resistance.
Just my 2c, though...