No - what I meant was that in the recent past everything was in multiples of twos. We had 2HAP and 2EPB, which would couple with 4CEP, 4CIG, 4VEP - you get the picture.....
Now we seem to have 2,3,4,5 (and 6 if you count the 442s) car sets, many of which can't be coupled to others as the...