I camped just now and it was successful! I saw 124/125. My
results were:

Actually this case is possible, because the aberdeen ad isn't
placed above EVERY door. The most obvious is if they connect one
half with int. ad and the other w/o it.
Wonder what'd happen if they connect half with STARIS and the
other half w/o...
Btw, 123/124 was the 40th train to be refurbished while
125/126 was the 21st, but 125/126 looks cleaner.