[CQ-Contest] WPX SN...has to be a better way!

[kr2q at optimum.net]

If condx are tough, or if you're just weak (my signal comes to mind), there has to be better
way of "correcting" the sent serial number.

Currently, it seems we all are limited to sending the complete SN over and over, even if only
one (1) digit is wrong.  This can lead to too much stuff to send as well as having previously
correct digits converted to incorrect digits.

I'm thinking about a "cut number - like" solution.  So if I'm sending SN 123 but the other guy 
copied 112 and asks a CFM, I should be able to send something like RR3 or KK3 or something 
so that he knows that he has the other stuff correct but that the last digit (in this case) is
wrong.  Sending 1324 multiple times is a pain.  Sending RR2R would be much better (I think?).

Comments?  And please don't tell me to just run more than 5 watts.  :-)

de Doug KR2Q