[Elecraft] K3 Hi Cut & Low Cut granularity bug?

[Rich - K1HTV]

K3 Hi Cut & Low Cut granularity bug?

Lately I've been running a number of digital modes (JT65A, PSK31 & RTTY) on the
HF bands. The K3's APF and dual PB filters really help to copy weak RTTY
signals, especially when there is QRM. When using the JT65A mode, signals even
weaker than -20 dB can be copied. These very weak signals are often effected by
much stronger signals within the receiver's pass band. Often, these very strong
signals will act on the K3's AGC and push the weaker signals farther into the
noise, making them uncopyable. 

I have found that adjusting the K3's 'Hi' and 'Lo' cut filters to be the
quickest and easiest way to reduce the QRM from adjacent loud signals. At times
an offending strong station is very close to the weak signal's frequency. The
'Hi-Cut' and 'Lo-Cut' filters must be adjusted so they attenuate the nearby loud
interfering signal but not the weak signal you are attempting to copy.
Unfortunately, these controls can only be adjusted in 100 Hz increments.
 
Although the SHIFT can be set up for 10Hz or 50 Hz increments, at present the
granularity of the K3's WIDTH, HI CUT, and LOW CUT controls can only be set to
100 Hz in the CW & Digital modes. 

Also, when the SHIFT granularity (CONFIG:PB CTL) is changed from 50Hz to 10Hz,
the Hi Cut and Low Cut controls do not work at all!  Is this a BUG or a FEATURE?
I'm presently using K3 firmware update MCU 4.36  .

It would be very helpful if the 'Hi-Cut' and 'Lo-Cut' filtering could be
adjusted in smaller increments than the present 100Hz.  Being able to fine tune
the Hi and Low cut filters would really help to quickly and easily reduce QRM
that might develop either above or below the digital signal being copied. 

I hope that this request can be implemented in a future revision of K3 software.

73,
Rich - K1HTV