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Here are a few things I have noticed.

1) The drawing of the plot is a very cpu intesive process and as you have noted elsewhere, running with "live update" enable is painful on anything except small plots. My assumption is that it is inherent in the python library used to do the plotting. I assume it simply plots all the points each time it is called. Not sure this is easily fixable. While "live update" is cool, this certainly isn't a necessity.

2) Turning off autoranging turns it off not only for signal strength, but also for the frequency scale. Again, I assume this is a function of the python graphing library, but resetting the frequency to match the scan range when you press the start button might be nice. I don't know if this is one of the changes that came in later updates.

3) For better or worse, auto ranging must be enabled in spectrogram mode. If I remember correctly, clicking on the "set range" button gives you signal strength ranges. However the graph doesn't update the time steps on the Y axis unless autoranging is enabled. Probably also a side effect of the python graphing library.

4) It would be useful when switching to spectogram mode if you didn't have to switch the configuration from "average scans" to "retain last scans", or if histogram mode had a separate setting for the number of scans to plot.

Like I said, mostly nitpicky things. Nothing that really impacts functionality.