[Elecraft] Filter adjustments

[Tom Skinner]

Good Morning Group,

Following the excellent advice on this forum, I set my cw filters using spectrogram. 

However, no matter how careful I am, my widest setting (at 160) always comes up a bit off - that is to say that when I tune in a signal to exactly zerobeat my 610 hz sidetone, the signal is spot on (so to speak) in the 80, 40 and 20 filters, but a bit off in 160.

Probably just my anal nature, but I would love them to all be on.

Any way to adjust just one of the filters without affecting them all - I have tried just doing the 160, saving that and restarting, but then the rest are out.

TIA,  es 73

Tom, KJ3D