Im curious......I've only known one guy to actually have a true failure, but it got me thinking on how safe are these things, like the eibach and billstein setup(not knocking the brands, as much just asking about the set up). That small groove on the shock doesnt seem like its really capable of holding the coil and all that pressure in. The fox, king, icon, etc. that are screwed on seems like they have a less likelyhood of failing, but I cant imagine that under all the different stresses and loads it wouldnt loosen up over time. I could be wrong, but I have personally seen one of these fail and guess that makes me a bit paranoid. Sadly no company makes a true NON RHA coilover, so Im limited to these options. Is this common, can someone educate my why theyre supposedly safe.