dx959 more slide

[m0t10n]

I know the galaxy drifts like a boat but its in the house run off a ps so the temperature is stable. I'm trying to get 1/2 way between channels so I can talk to people from 27.555 usb on the channel they want to go to . basically need 5 kc up and down. can I Change C130 from (20pF) to 4pF and R153 from (12K) to 10K. would this give me enough slide on the clarifier or do you guys recommend a different approach? thx in advance.