Talk:TIE Aggressor Expansion Pack/@comment-71.95.210.62-20170522183941/@comment-27221056-20170523063258

That's the timing window for modifications. Cancelling and adding dice are not modifications. Read the FAQ entry on "Omega Leader"'s page. Adding and cancelling dice typically happens at different timing windows; range, when attacking and defending, debris when defending, LWF after rolling defense dice, Crack Shot after comparing results, R3 Astromech when modifying attack dice.