[Elecraft] acceptable amount of drift?

[Tim]

Hi folks -
I have no idea what is considered acceptable drift so maybe someone can give
me some feeback? My K2/100 has every mod every required done to it. Last
night after about an hour ragchew with my code buddy he said it appeared
that I may have drifted about 80Hz on 40 meters. He's an engineer and
usually dead on about these things. If it did drift 80Hz in an hour, is that
a reasonable amount to tolerate? doesn't really bother me - just want to
know if it's mormal. Thanks folks. 73/Tim NZ7C