[Elecraft] K2 Roofing Filter?

[Joe-aa4nn]

In view of this, and excuse me for not being an engineer in receiver design,
why is there not a roofing filter option for the K2.  Is it just not 
possible in
a single conversion rig?
de Joe, aa4nn
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>The close in *LOUD* signals is where there was a definite deficiency vs
>the FT1000D.  A local, K7OX, was running HP, just a few miles away.  If
>I was anywhere within about 10khz of him, I could still hear him on the
>K2.  The FT1000D was dead quiet right up next to him.  IMO, this is the
>only problem with the K2's RX!