I bought a 6 wire grounding kit from them last year (the clear/silver one). We promoted his product pretty heavily at Zchickz.com. Lately, since the tubing is clear, it has started to yellow a bit from the heat. I emailed him to see if this was normal or if there was something that I could do to reverse it (bleach? something?). In short, he sent me a replacement free of charge, no questions asked. I thought that was really really cool of him. Cheers to Z-Xtreme!