But in C they have a power mad TSAer that makes you take off your shoes (my soles measure 9mm and the heel is 1.5cm) after you do not follow his "suggestion" to remove them.

BTW, I take the north security check point in A often because usually it is not as crowded as the ones near the ticket counters. Beware that they can have a back log of newbies and selectees that can slow down the line.