Have not....got some of the TAF stuff and the Fremen stuff....I kicked Fremen a donation and he sent me some cabs that I really dig. Haven't needed to buy any, really. Every time I think about it I find another in the stock stuff or mine that works really well with my patches, so I just haven't. I've thought about 13, though....I dig Mesa cabs and think that one would sound huge with my 8...plus I've used a bunch of Clark's cabs and they're badass. Let me know if you grab something good.