Interesting to read 7 yrs of 412 EP ops. RAF Shawbury's DHFS experienced operators beep down on nav sorties to reduce the mast Tq and therefore achieve even more IAS but moreover in this PC world less noise from the extemely loud tail rotor. We did an unofficial trial last year and the difference was you could get about 2nm closer to the bad guys before you were heard at 120kts. But flying at 97% in OIE condition is not good, but that's wehy it's in the FRC's to ensure that you beep back up to 100% post an engine failure.
Blue skies and light landings.