[Elecraft] [K2] RIT question

[Jibeji]

Hello.
I have finished to build my K2 #3249.
Except of 12 meters band, which still doesn't work, all work perfectly.
However, I have a question about the RIT function.
When I place the RIT potentiometer in its middle position (0) and I push RIT
button  I have an offset of about -500 Hz. So, to have the same reveicer
frequency with or without RIT, the potentiometer has to be turned CW of
about 1/4 turn.
Is the center position settable ?
Thanks, 73
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F8DQL
UFT 1116