So just because it was the first time YOU heard this, it makes me wrong?
I'd love to see what you have to prove me incorrect.
As I posted...the spool system is not "fail proof". They are known to be weak (there are several people/companies that fix/repair/reinforce spool type K members), but I, personally, have never had to repair the eairlier K. That is not to say it never happens, just that I have never had to do it.