Bengerman ,
Just to make it clear ,
4 DME = 1200ft
and you say
gear down+ flaps 3 +flaps full + reduce to Vapp + Spool Up
takes just 100 ft and you are stabilized at 1100ft??
There is no way of achiving it.Not in this world at least.
In my opinion this "160kt till 4 "thing is not just about noise, priority is the squencing of the aircrafts.The crowded airports like LHR they keep 2.5 miles between the aircrafts on final and they need precise speeds to use the airport at maximum.
And they are ridicilously strict about this thing that , there was a report i saw , saying we crossed 4 miles at 159 kt.
You are right about the noise( actually its not beyond the limits) but after i saw that report i use my tecnic.