This was back in the day when I purchased my two Diezel Herberts with matching 4x12 V30 cabs. Edward Yoon was the owner/operator of Tone Merchants at the time up north in Anaheim CA. GG's a great player, but even the great GG will imply you that listening to him for more than 2 hours straight sounds like he's just going through practice routines and exercises 1000s of times.