Rssi adjustment, after

Hi all
in the past i have used
but now i have tried to improve my data but looks like im at the best i can get
distance is upto 220nmi i dont loose much distant data even though i have a couple local very high -1.9 would yhou agree im getting the best
i have messed about with gain for many months and seems rssi also looks the best

Total Aircraft: 180 Messages: 1510.9/sec
With Positions: 144History: 165678 positions