What I like about three link couplings is scale operation in terms of time.
model Train stops in the right place
I look around for the bent bit of brass thingy
decide I need my glasses
look for glasses
Oh, there on my head (slightly greasy now having sat on my hair - too much detail I know)
Now, with glasses improved chance of finding the bent bit of brass
Fiddle, fiddle, fiddle, cuss.... Tonge just slightly poking out of mouth for reasons of concentration.
done it.
That sort of replicates the shunter bloke / guard etc, climbing down, ducking under, asking the driver to back up a bit more, haul the ludicrously big lump of cast steel off / or on to the hook
duck back under and give the thumbs up
Andy