100% correct and the perceived t-25 window is a myth a best.
Myself and my several team members fly this route very often from iah or midwest, and we have developed a script tool (mobile and desktop) which scans ef every 10 min while bypassing the captchas. As long as there is j7 and data is normalized in jmp package for big events at hkg and weather/cancellations at dfw, there is clear pattern of c inventory release by aa.
