I can’t see where they would be so life threatening, they push the heim joints and they are or could be the weak link. Are the welds good? If not 1/4” steel that would be the only other problem. Basically the Chinese could make them identical to Calverts but pay the guy making them $2.50 to sell them that cheap and still make a tidy profit. The Chinese have good machinery they just don’t have to pay union wages