I just listened to the clips as well. The Carlos tune sounds nice. I really like the tone he's able to get. I'm wondering if I might be able get something like that on my six string. I wouldn't have the upper end range that a piccolo bass would have; but a good bit of what he's doing would be within the six string's range. I picked up an overdrive on ebay a couple weeks ago that is supposedly on its way here (it got shipped to the wrong address and is being rerouted). I wasn't sure if I would be happy with it, so hearing Bromberg's Metal tunes is encouraging. Hopefully, I'll find out next week.