Sounds like there may be some inconsistancies in the casting process, AKA quality controll! This can easily happen on mass produced cast products. A mold only last so long before it de-grades and has to be re-placed. That is why some people have good luck with them and others find them of low quality. It ALWAYS come down to "you get what you pay for!"
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No matter how much you spend, or how much you prepare, there is ALWAYS someone else faster or quicker than YOU!!!!!!!!!!
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