[Elecraft] [K2] Confused when calibrating 4MHz oscillator

[Gareth - M5KVK]

I know this has been done to death on here, but I'm confused.

I'm following Wayne's procedure to calibrate the 4MHz oscillator. I'm using
Radio China International on 9600kHz. By comparing the Rx audio on the K2
with that received on another receiver, I see that the Dial f on the K2 is
9600.44kHz.

Now, according to Wayne's instructions, I adjust C22 whilst comparing TP1
and TP2.

Now,the audio pitch, and thus my subjective comparison of the correct
frequency, is being determined partly by the BFO frequency isn't it? So,
surely this approach is flawed?

What am I missing?

Gareth - M5KVK