Weigh epics based on story points for initiative progress

Not all of my epics under an initiative are equal size and Aha is considering them that way, which makes the progress inaccurate. For example, there are 5 epics under an initiative and Aha is treating them all as 20% of the Initiative. I want to tell Aha to use the Initial estimate until the epic is fully sized and then use the Detailed estimate to give weight to the Epic. For example, If Epic A has 100 story points and Epic B has 50 story points, I want Epic A progress to contribute twice as much as Epic B to the Initiative progress.