Quoted from JediMcMuffin:The last set of pictures really helped a newbie like me understand what to look for, and that replacing them is not a huge deal or very difficult (though annoying). Thanks folks.
IMO it's worth buying a few coil stops just to have on hand. If one blows you can fix in 60 seconds. Eventually you'll need to replace them due to wear anyway, so either way it's not lost money.