[Elecraft] KIO2 "Gotcha's" and "Trip Wires"?

[Paul Clay]

As I'm about to embark on building and installing 
a KIO2 in my K2, all of this "wrong serial cable" 
traffic has got me a bit worried.  

I'm assuming that the same disastrous consequences 
arising from the use of a standard serial cable 
might arise from an accidental "mis-wiring" of 
the KIO2 or its custom serial cable.  (I seem to 
recall a poster a while back lamenting that he'd 
blown his K2 as a result of an incorrectly 
installed part or sloppy solder joint on his 
KIO2).

Are there some steps or connections in the 
assembly process that I need to be extra careful 
about?  Any possible "gotcha's" I need to be 
aware of?  Can I assume (that can be dangerous) 
that if my KIO2 and cable pass their resistance 
and continuity checks OK, the unit still may not 
work but it won't fry my K2?  :=)

I plan on triple checking my work as I go, as 
usual for me, but think a little extra insurance 
in the form of this List's sage advice is a wise 
investment.

Happy holidays,
Paul N6LQ