[Elecraft] Relay life in KAT2?

[Joe P]

I just finished building the KAT2 ATU and adding it to my K2.  It all 
seems to work just fine, but I was wondering how long those little 
relays will last under "normal" use.  They seem to go through up to 10 
seconds of very intense chatter when I tune up.  I'm sure it's perfectly 
normal, but it sounds perfectly awful :-)

Has anyone had a relay fail yet?  Should I order a few spares to have on 
hand for the inevitable day?

73
Joe
KB8AP