This isn't a communications style receiver, so I wouldn't expect great performance from it.
Adding a longwire antenna instead of the whip will really help here.
If you're convinced it needs an alignment, adjust A13 and A15, noting there original positions.
adjust A12 and A14, unless you really know what you're doing.
It's possible you can gain a bit more sensitivity by slightly
adjusting the if cans,
but more than likely they're OK.
It's easy to get in there and twiddle on those adjustments only to find you've made things worse.
Been there, done that.
~ Mitch ~