I personally didn't like the Natas when I tried it. It sounded synthetic and the powerchords didn't sound as growly or big/wide as I wanted. I AB'ed with a Baron DHG that I bought at the time (don't have it anymore) and I thought it smoked the Natas. It sounded way bigger and more growly and aggressive and every bit as tight and articulate. The Natas though had a metallic quality that was especially noticeable on chugs and I liked that aspect of it, but overall it was one of the most disappointing amps for me. Not trying to rain on the parade, just sharing my thoughts. I love my Grind pedal and would still love to try the Cali mod if I get a chance. I'm curious how his mods compare to Gowers.