first hand, not the ones I heard about, were I think the first couple you sold about 2-3 years ago. Once again greg not saying anything bad about you or your product, your a standup guy and personaly I think you have the best customer service(besides coz) of any of the vendors on this forum I was just asking about welding manis and what would cause the ones you had to crack since there have been known cases. BTW when i had my z i had many of your products on it without anyproblems, and would deff buy them again if I bought another one.