Pete ... humble apologies for the delayed response... was travelling to the UK - and then there was booze... and wimmen. Ya know how
THAT goes!
Anyway, yes, even tho my machine ain't as slippery as yours, the same considerations apply coz it takes a while to slow a B200 from 220 KIAS to 200 for approach flap, then back to 180 for the gear. I like to have meself sorted at GP intercept.
bookworm ... I appreciate your comments but the fact is that, things are changing throughout the approach. In fact, they're changing right from the moment you leave crz alt. The airspeed is changing a bit, the TAS is changing a lot. It is for this reason that a "close approximation" works so well. But I'm sure you already knew that.