I've never had a problem? I can always remember EMT's HSTs. Standard HST and pullman rake respectively: standard class black, first class red
PC-A-B-C-D-E-F-G-J-PC
PC-A-C-D-E-F-G-H-J-PC
Coach A is always quiet coach, Coach F is the buffet
Yet on NXEC the set starts with B and not A....