Thank you for your help.I will give it a try tomorrow and let you know how it goes.
I was not able to zero beat the carrier from WWV on 10MHz (there was no null or center).
I also may have deleted the default values when using the KD8CEC Memory Manager. What default values do you use?
One guy used a Master Cal of 143000 and USB Cal of 11996200 which worked fairly well except for the 270 Hz error which I couldn't correct.
Will let you know tomorrow....