How to setup the SDR for maximum and close range? Impossible?

There are two ways to change mutability to fa:

(1) Keep the dump1090-mutability, but replace its two-clock map by SkyView map of dump1090-fa

(2) Remove completely dump1090-mutability, and in its place install dump1090-fa

Both these methods are given here as options (a) and (b):

TWEAKS >> Tweak-2

NOTE:
In option (b), which is for completely removing dump1090-mutability, there are two commands given, one is --remove, second is --purge. Actually only one of these is required, and --purge is better. If you give both, the first one will work, next wont. Better do not use --remove command, and give only --purge command.