[Elecraft] Quality of NR in new KDSP2?

[phoon.usinet]

Steve Zumbrun posted to the list that the new KDSP2 works as well on CW and
SSB as the DSP in the IC-756 Pro.

However, since I am hearing disabled,  more specifics from Steve other new
KDSP2 users would be appreciated:

1) How well does the KDSP2 reduce QRN, the kind you get on 40M during a
summer evening?  One night last week, QRN held my S meter at S7.

2)  Once you set your CW and SSB filter bandwidths with Spectrogram software
satisfactorily, what effect(s) in CW and SSB does the  KDSP2  add to an
already well selected bandwidth for CW or SSB?

3)  The K2 is sold with an audio filter accessory.  Is it necessary, or
desirable to have both?  Or, now that the KDSP2 is out, is the audio filter
redundant and unneeded?

4)  Is the pulse/ignition noise filter accessory for the K2 no longer
necessary if you install the KDSP2?

Thanks,

VE1CHS