Hi all,
Joe VE7VXO recently made new HR500 firmware available. It includes a number of improvements from various sources (mine included) and I think you want to have a look at it.
Have a look at README.md for details.
Unfortunately, Joe has troubles logging in on google and asked me to post on his behalf.
Note that the software distribution includes notes on running the HR500 on 160m which you may want to be aware of.
I really like Joe's improvements - have a look.
73, Geert Jan PE1HZG