My role model for his brains, calm demeanour and appetite for snacks!
That article uses an outdated set of rules.
The last paragraph of the same page in the article states rule 15.54 as follows:
15.54 EARLY GERMAN OVERRUNS AND EXPLOITATION:
ATTACKS: "Ex" results from German overruns and exploitation attacks are treated as "Ex-1" results:
which indicates a previous need to roll for overruns.
Now, the same rule 15.54 in the latest ruleset now reads as:
15.54 EARLY GERMAN EXPLOITATION ATTACKS: "Ex" results from German exploitation attacks are treated as "Ex-1" results:
"Overruns" has been removed from the rule because of the lack of a need for a combat roll, which is consistent with 13.54